25135873 has 6 divisors (see below), whose sum is σ = 29239746. Its totient is φ = 21544992.

The previous prime is 25135867. The next prime is 25135897. The reversal of 25135873 is 37853152.

It can be written as a sum of positive squares in only one way, i.e., 23736384 + 1399489 = 4872^2 + 1183^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25135873 is a prime.

It is a super-2 number, since 2×25135873² = 1263624222944258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25135813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256440 + ... + 256537.

It is an arithmetic number, because the mean of its divisors is an integer number (4873291).

Almost surely, 2^25135873 is an apocalyptic number.

It is an amenable number.

25135873 is a deficient number, since it is larger than the sum of its proper divisors (4103873).

25135873 is an equidigital number, since it uses as much as digits as its factorization.

25135873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512991 (or 512984 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 25135873 is about 5013.5688885264. The cubic root of 25135873 is about 292.9305437838.

The spelling of 25135873 in words is "twenty-five million, one hundred thirty-five thousand, eight hundred seventy-three".