2557971 has 12 divisors (see below), whose sum is σ = 3979248. Its totient is φ = 1574064.

The previous prime is 2557967. The next prime is 2557999. The reversal of 2557971 is 1797552.

It is not a de Polignac number, because 2557971 - 2² = 2557967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2557901) 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, 10815 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (331604).

2^2557971 is an apocalyptic number.

2557971 is a deficient number, since it is larger than the sum of its proper divisors (1421277).

2557971 is a wasteful number, since it uses less digits than its factorization.

2557971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21882 (or 21879 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The square root of 2557971 is about 1599.3658118142. The cubic root of 2557971 is about 136.7619251276.

The spelling of 2557971 in words is "two million, five hundred fifty-seven thousand, nine hundred seventy-one".