3157947 has 20 divisors (see below), whose sum is σ = 5082000. Its totient is φ = 1942704.

The previous prime is 3157927. The next prime is 3157949. The reversal of 3157947 is 7497513.

It is a happy number.

3157947 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 3157947 - 2¹⁵ = 3125179 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3157949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 447 + ... + 2552.

It is an arithmetic number, because the mean of its divisors is an integer number (254100).

Almost surely, 2^3157947 is an apocalyptic number.

3157947 is a deficient number, since it is larger than the sum of its proper divisors (1924053).

3157947 is a wasteful number, since it uses less digits than its factorization.

3157947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024 (or 3015 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 3157947 is about 1777.0613382773. The cubic root of 3157947 is about 146.7128923393.

It can be divided in two parts, 31579 and 47, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 3157947 in words is "three million, one hundred fifty-seven thousand, nine hundred forty-seven".