25587140 has 12 divisors (see below), whose sum is σ = 53733036. Its totient is φ = 10234848.

The previous prime is 25587137. The next prime is 25587143. The reversal of 25587140 is 4178552.

It is an interprime number because it is at equal distance from previous prime (25587137) and next prime (25587143).

It can be written as a sum of positive squares in 2 ways, for example, as 20214016 + 5373124 = 4496^2 + 2318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25587097 and 25587106.

It is not an unprimeable number, because it can be changed into a prime (25587143) 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, 639659 + ... + 639698.

It is an arithmetic number, because the mean of its divisors is an integer number (4477753).

Almost surely, 2^25587140 is an apocalyptic number.

25587140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25587140 is an abundant number, since it is smaller than the sum of its proper divisors (28145896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25587140 is a wasteful number, since it uses less digits than its factorization.

25587140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279366 (or 1279364 counting only the distinct ones).

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

The square root of 25587140 is about 5058.3732562950. The cubic root of 25587140 is about 294.6731609533.

The spelling of 25587140 in words is "twenty-five million, five hundred eighty-seven thousand, one hundred forty".