25887857 has 4 divisors (see below), whose sum is σ = 27013440. Its totient is φ = 24762276.

The previous prime is 25887853. The next prime is 25887871. The reversal of 25887857 is 75878852.

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 not a de Polignac number, because 25887857 - 2² = 25887853 is a prime.

It is a super-2 number, since 2×25887857² = 1340362280104898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25887853) 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, 562757 + ... + 562802.

It is an arithmetic number, because the mean of its divisors is an integer number (6753360).

Almost surely, 2^25887857 is an apocalyptic number.

It is an amenable number.

25887857 is a deficient number, since it is larger than the sum of its proper divisors (1125583).

25887857 is a wasteful number, since it uses less digits than its factorization.

25887857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125582.

The product of its digits is 1254400, while the sum is 50.

The square root of 25887857 is about 5088.0111045476. The cubic root of 25887857 is about 295.8230658254.

The spelling of 25887857 in words is "twenty-five million, eight hundred eighty-seven thousand, eight hundred fifty-seven".