25158540 has 48 divisors (see below), whose sum is σ = 76849920. Its totient is φ = 6098880.

The previous prime is 25158533. The next prime is 25158613. The reversal of 25158540 is 4585152.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25158498 and 25158507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18400 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (1601040).

Almost surely, 2^25158540 is an apocalyptic number.

25158540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25158540 is an abundant number, since it is smaller than the sum of its proper divisors (51691380).

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

25158540 is a wasteful number, since it uses less digits than its factorization.

25158540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38142 (or 38140 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 25158540 is about 5015.8289444518. The cubic root of 25158540 is about 293.0185701906.

The spelling of 25158540 in words is "twenty-five million, one hundred fifty-eight thousand, five hundred forty".