25686057 has 8 divisors (see below), whose sum is σ = 34301376. Its totient is φ = 17097392.

The previous prime is 25686053. The next prime is 25686071. The reversal of 25686057 is 75068652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25686057 - 2² = 25686053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25686053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4293 + ... + 8354.

It is an arithmetic number, because the mean of its divisors is an integer number (4287672).

Almost surely, 2^25686057 is an apocalyptic number.

It is an amenable number.

25686057 is a deficient number, since it is larger than the sum of its proper divisors (8615319).

25686057 is a wasteful number, since it uses less digits than its factorization.

25686057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13327.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 25686057 is about 5068.1413752973. The cubic root of 25686057 is about 295.0523970895.

The spelling of 25686057 in words is "twenty-five million, six hundred eighty-six thousand, fifty-seven".