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1398101 = 2389683

1398101 has 8 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 1320352.

The previous prime is 1398091. The next prime is 1398107. The reversal of 1398101 is 1018931.

1398101 is nontrivially palindromic in base 2, base 4 and base 8.

1398101 is an esthetic number in base 2, because in such base it adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(1398101) divides (1398101-1)3.

It is a cyclic number.

It is not a de Polignac number, because 1398101 - 26 = 1398037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is the 22-nd Jacobsthal number.

It is a deceptive number, since it divides R1398100.

It is a Duffinian number.

1398101 is an undulating number in base 2 and base 8.

It is a Curzon number.

1398101 is a nontrivial repdigit in base 4.

It is a plaindrome in base 4 and base 16.

It is a nialpdrome in base 4.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398107) by changing a digit.

It is a nontrivial repunit in base 4.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

It is a Poulet number, since it divides 21398100-1.

21398101 is an apocalyptic number.

1398101 is the 683-rd octagonal number.

It is an amenable number.

1398101 is a deficient number, since it is larger than the sum of its proper divisors (79339).

1398101 is an equidigital number, since it uses as much as digits as its factorization.

1398101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1398101 is about 1182.4132103457. The cubic root of 1398101 is about 111.8182905997.

The spelling of 1398101 in words is "one million, three hundred ninety-eight thousand, one hundred one".

Divisors: 1 23 89 683 2047 15709 60787 1398101