3157881 has 8 divisors (see below), whose sum is σ = 4218720. Its totient is φ = 2101152.

The previous prime is 3157879. The next prime is 3157919. The reversal of 3157881 is 1887513.

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

It is not a de Polignac number, because 3157881 - 2¹ = 3157879 is a prime.

It is a super-2 number, since 2×3157881² = 19944424820322, which contains 22 as substring.

3157881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3157811) 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, 2541 + ... + 3573.

It is an arithmetic number, because the mean of its divisors is an integer number (527340).

Almost surely, 2^3157881 is an apocalyptic number.

It is an amenable number.

3157881 is a deficient number, since it is larger than the sum of its proper divisors (1060839).

3157881 is a wasteful number, since it uses less digits than its factorization.

3157881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its digits is 6720, while the sum is 33.

The square root of 3157881 is about 1777.0427681966. The cubic root of 3157881 is about 146.7118702493.

The spelling of 3157881 in words is "three million, one hundred fifty-seven thousand, eight hundred eighty-one".