2501657 has 2 divisors, whose sum is σ = 2501658. Its totient is φ = 2501656.

The previous prime is 2501651. The next prime is 2501677. The reversal of 2501657 is 7561052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2298256 + 203401 = 1516^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501657 - 2⁶ = 2501593 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250828 + 1250829.

It is an arithmetic number, because the mean of its divisors is an integer number (1250829).

2^2501657 is an apocalyptic number.

It is an amenable number.

2501657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501657 is an equidigital number, since it uses as much as digits as its factorization.

2501657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2501657 is about 1581.6627326962. The cubic root of 2501657 is about 135.7508594740.

The spelling of 2501657 in words is "two million, five hundred one thousand, six hundred fifty-seven".