1398081 has 4 divisors (see below), whose sum is σ = 1864112. Its totient is φ = 932052.

The previous prime is 1398079. The next prime is 1398083. The reversal of 1398081 is 1808931.

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: 1808931 = 3 ⋅602977.

It is an interprime number because it is at equal distance from previous prime (1398079) and next prime (1398083).

It is not a de Polignac number, because 1398081 - 2¹ = 1398079 is a prime.

It is a super-2 number, since 2×1398081² = 3909260965122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1398083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233011 + ... + 233016.

It is an arithmetic number, because the mean of its divisors is an integer number (466028).

2^1398081 is an apocalyptic number.

It is an amenable number.

1398081 is a deficient number, since it is larger than the sum of its proper divisors (466031).

1398081 is an equidigital number, since it uses as much as digits as its factorization.

1398081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466030.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1398081 is about 1182.4047530351. The cubic root of 1398081 is about 111.8177574059.

The spelling of 1398081 in words is "one million, three hundred ninety-eight thousand, eighty-one".