25138575 has 72 divisors (see below), whose sum is σ = 56174976. Its totient is φ = 10440000.

The previous prime is 25138573. The next prime is 25138583. The reversal of 25138575 is 57583152.

25138575 is a `hidden beast` number, since 2 + 51 + 38 + 575 = 666.

It is not a de Polignac number, because 25138575 - 2¹ = 25138573 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16600 + ... + 18050.

It is an arithmetic number, because the mean of its divisors is an integer number (780208).

Almost surely, 2^25138575 is an apocalyptic number.

25138575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25138575 is an abundant number, since it is smaller than the sum of its proper divisors (31036401).

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

25138575 is a wasteful number, since it uses less digits than its factorization.

25138575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485 (or 1477 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 25138575 is about 5013.8383500069. The cubic root of 25138575 is about 292.9410396724.

The spelling of 25138575 in words is "twenty-five million, one hundred thirty-eight thousand, five hundred seventy-five".