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BaseRepresentation
bin10101111001
31220220
4111321
521101
610253
74041
oct2571
91826
101401
111064
12989
1383a
14721
15636
hex579

1401 has 4 divisors (see below), whose sum is σ = 1872. Its totient is φ = 932.

The previous prime is 1399. The next prime is 1409. The reversal of 1401 is 1041.

Adding to 1401 its reverse (1041), we get a palindrome (2442).

It can be divided in two parts, 140 and 1, that added together give a palindrome (141).

1401 is nontrivially palindromic in base 12 and base 15.

1401 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1041 = 3347.

It is a cyclic number.

It is not a de Polignac number, because 1401 - 21 = 1399 is a prime.

It is a D-number.

1401 is an undulating number in base 12 and base 15.

It is a Curzon number.

1401 is a lucky number.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1401.

It is not an unprimeable number, because it can be changed into a prime (1409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231 + ... + 236.

It is an arithmetic number, because the mean of its divisors is an integer number (468).

It is an amenable number.

1401 is a deficient number, since it is larger than the sum of its proper divisors (471).

1401 is an equidigital number, since it uses as much as digits as its factorization.

1401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1401 is about 37.4299345444. The cubic root of 1401 is about 11.1895523320.

The spelling of 1401 in words is "one thousand, four hundred one", and thus it is an iban number.

Divisors: 1 3 467 1401