25249925 has 6 divisors (see below), whose sum is σ = 31309938. Its totient is φ = 20199920.

The previous prime is 25249921. The next prime is 25249927. The reversal of 25249925 is 52994252.

It can be written as a sum of positive squares in 3 ways, for example, as 1737124 + 23512801 = 1318^2 + 4849^2 .

It is not a de Polignac number, because 25249925 - 2² = 25249921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25249921) 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, 504974 + ... + 505023.

It is an arithmetic number, because the mean of its divisors is an integer number (5218323).

Almost surely, 2^25249925 is an apocalyptic number.

25249925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25249925 is a deficient number, since it is larger than the sum of its proper divisors (6060013).

25249925 is a wasteful number, since it uses less digits than its factorization.

25249925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010007 (or 1010002 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 25249925 is about 5024.9303477760. The cubic root of 25249925 is about 293.3729249533.

The spelling of 25249925 in words is "twenty-five million, two hundred forty-nine thousand, nine hundred twenty-five".