3161257 has 4 divisors (see below), whose sum is σ = 3448656. Its totient is φ = 2873860.

The previous prime is 3161237. The next prime is 3161273. The reversal of 3161257 is 7521613.

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: 7521613 = 11 ⋅683783.

It is not a de Polignac number, because 3161257 - 2⁷ = 3161129 is a prime.

It is a Duffinian number.

3161257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3161227) 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, 143683 + ... + 143704.

It is an arithmetic number, because the mean of its divisors is an integer number (862164).

Almost surely, 2^3161257 is an apocalyptic number.

It is an amenable number.

3161257 is a deficient number, since it is larger than the sum of its proper divisors (287399).

3161257 is a wasteful number, since it uses less digits than its factorization.

3161257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287398.

The product of its digits is 1260, while the sum is 25.

The square root of 3161257 is about 1777.9924071829. The cubic root of 3161257 is about 146.7641334468.

The spelling of 3161257 in words is "three million, one hundred sixty-one thousand, two hundred fifty-seven".