25131424 has 12 divisors (see below), whose sum is σ = 49477554. Its totient is φ = 12565696.

The previous prime is 25131419. The next prime is 25131437. The reversal of 25131424 is 42413152.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 12027024 = 3620^2 + 3468^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25131395 and 25131404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392647 + ... + 392710.

Almost surely, 2^25131424 is an apocalyptic number.

It is an amenable number.

25131424 is a deficient number, since it is larger than the sum of its proper divisors (24346130).

25131424 is an equidigital number, since it uses as much as digits as its factorization.

25131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785367 (or 785359 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 25131424 is about 5013.1251729834. The cubic root of 25131424 is about 292.9132600543.

Adding to 25131424 its reverse (42413152), we get a palindrome (67544576).

The spelling of 25131424 in words is "twenty-five million, one hundred thirty-one thousand, four hundred twenty-four".