25164424 has 8 divisors (see below), whose sum is σ = 47183310. Its totient is φ = 12582208.

The previous prime is 25164409. The next prime is 25164427. The reversal of 25164424 is 42446152.

It can be written as a sum of positive squares in only one way, i.e., 21622500 + 3541924 = 4650^2 + 1882^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25164392 and 25164401.

It is not an unprimeable number, because it can be changed into a prime (25164427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572769 + ... + 1572784.

Almost surely, 2^25164424 is an apocalyptic number.

It is an amenable number.

25164424 is a deficient number, since it is larger than the sum of its proper divisors (22018886).

25164424 is a wasteful number, since it uses less digits than its factorization.

25164424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145559 (or 3145555 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 25164424 is about 5016.4154532893. The cubic root of 25164424 is about 293.0414118297.

The spelling of 25164424 in words is "twenty-five million, one hundred sixty-four thousand, four hundred twenty-four".