2501857 has 4 divisors (see below), whose sum is σ = 2555136. Its totient is φ = 2448580.

The previous prime is 2501843. The next prime is 2501881. The reversal of 2501857 is 7581052.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2501857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501897) 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, 26569 + ... + 26662.

It is an arithmetic number, because the mean of its divisors is an integer number (638784).

2^2501857 is an apocalyptic number.

It is an amenable number.

2501857 is a deficient number, since it is larger than the sum of its proper divisors (53279).

2501857 is an equidigital number, since it uses as much as digits as its factorization.

2501857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53278.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 2501857 is about 1581.7259560366. The cubic root of 2501857 is about 135.7544770028.

The spelling of 2501857 in words is "two million, five hundred one thousand, eight hundred fifty-seven".