25165940 has 12 divisors (see below), whose sum is σ = 52848516. Its totient is φ = 10066368.

The previous prime is 25165927. The next prime is 25165981. The reversal of 25165940 is 4956152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8042896 + 17123044 = 2836^2 + 4138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25165897 and 25165906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629129 + ... + 629168.

It is an arithmetic number, because the mean of its divisors is an integer number (4404043).

Almost surely, 2^25165940 is an apocalyptic number.

25165940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25165940 is an abundant number, since it is smaller than the sum of its proper divisors (27682576).

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

25165940 is a wasteful number, since it uses less digits than its factorization.

25165940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258306 (or 1258304 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 25165940 is about 5016.5665549258. The cubic root of 25165940 is about 293.0472963522.

The spelling of 25165940 in words is "twenty-five million, one hundred sixty-five thousand, nine hundred forty".