25870657 has 2 divisors, whose sum is σ = 25870658. Its totient is φ = 25870656.

The previous prime is 25870619. The next prime is 25870667. The reversal of 25870657 is 75607852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 2792241 = 4804^2 + 1671^2 .

It is a cyclic number.

It is not a de Polignac number, because 25870657 - 2⁷ = 25870529 is a prime.

It is a super-2 number, since 2×25870657² = 1338581787223298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25870667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935328 + 12935329.

It is an arithmetic number, because the mean of its divisors is an integer number (12935329).

Almost surely, 2^25870657 is an apocalyptic number.

It is an amenable number.

25870657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25870657 is an equidigital number, since it uses as much as digits as its factorization.

25870657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 25870657 is about 5086.3205758190. The cubic root of 25870657 is about 295.7575359515.

The spelling of 25870657 in words is "twenty-five million, eight hundred seventy thousand, six hundred fifty-seven".