25540506 has 12 divisors (see below), whose sum is σ = 55337802. Its totient is φ = 8513496.

The previous prime is 25540483. The next prime is 25540507. The reversal of 25540506 is 60504552.

25540506 is a `hidden beast` number, since 255 + 405 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15139881 + 10400625 = 3891^2 + 3225^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25540506.

It is not an unprimeable number, because it can be changed into a prime (25540507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 709441 + ... + 709476.

Almost surely, 2^25540506 is an apocalyptic number.

25540506 is an abundant number, since it is smaller than the sum of its proper divisors (29797296).

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

25540506 is a wasteful number, since it uses less digits than its factorization.

25540506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418925 (or 1418922 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 25540506 is about 5053.7615693659. The cubic root of 25540506 is about 294.4940326224.

The spelling of 25540506 in words is "twenty-five million, five hundred forty thousand, five hundred six".