1392881 has 8 divisors (see below), whose sum is σ = 1601664. Its totient is φ = 1186560.

The previous prime is 1392877. The next prime is 1392883. The reversal of 1392881 is 1882931.

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

It is a cyclic number.

It is not a de Polignac number, because 1392881 - 2² = 1392877 is a prime.

It is a super-2 number, since 2×1392881² = 3880234960322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (200208).

2^1392881 is an apocalyptic number.

It is an amenable number.

1392881 is a deficient number, since it is larger than the sum of its proper divisors (208783).

1392881 is a wasteful number, since it uses less digits than its factorization.

1392881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its digits is 3456, while the sum is 32.

The square root of 1392881 is about 1180.2037959607. The cubic root of 1392881 is about 111.6789541193.

The spelling of 1392881 in words is "one million, three hundred ninety-two thousand, eight hundred eighty-one".