2557947 has 12 divisors (see below), whose sum is σ = 3967656. Its totient is φ = 1461600.

The previous prime is 2557937. The next prime is 2557957. The reversal of 2557947 is 7497552.

It is an interprime number because it is at equal distance from previous prime (2557937) and next prime (2557957).

It is not a de Polignac number, because 2557947 - 2⁴ = 2557931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2557937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8554 + ... + 8847.

It is an arithmetic number, because the mean of its divisors is an integer number (330638).

2^2557947 is an apocalyptic number.

2557947 is a deficient number, since it is larger than the sum of its proper divisors (1409709).

2557947 is a wasteful number, since it uses less digits than its factorization.

2557947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17418 (or 17411 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The square root of 2557947 is about 1599.3583088226. The cubic root of 2557947 is about 136.7614974062.

The spelling of 2557947 in words is "two million, five hundred fifty-seven thousand, nine hundred forty-seven".