25140857 has 16 divisors (see below), whose sum is σ = 30384000. Its totient is φ = 20321280.

The previous prime is 25140851. The next prime is 25140859. The reversal of 25140857 is 75804152.

It is not a de Polignac number, because 25140857 - 2¹⁰ = 25139833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25140851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55769 + ... + 56217.

It is an arithmetic number, because the mean of its divisors is an integer number (1899000).

Almost surely, 2^25140857 is an apocalyptic number.

It is an amenable number.

25140857 is a deficient number, since it is larger than the sum of its proper divisors (5243143).

25140857 is a wasteful number, since it uses less digits than its factorization.

25140857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 25140857 is about 5014.0659150035. The cubic root of 25140857 is about 292.9499034900.

The spelling of 25140857 in words is "twenty-five million, one hundred forty thousand, eight hundred fifty-seven".