25572340 has 12 divisors (see below), whose sum is σ = 53701956. Its totient is φ = 10228928.

The previous prime is 25572331. The next prime is 25572353. The reversal of 25572340 is 4327552.

It can be written as a sum of positive squares in 2 ways, for example, as 7628644 + 17943696 = 2762^2 + 4236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25572299 and 25572308.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 639289 + ... + 639328.

It is an arithmetic number, because the mean of its divisors is an integer number (4475163).

Almost surely, 2^25572340 is an apocalyptic number.

25572340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25572340 is an abundant number, since it is smaller than the sum of its proper divisors (28129616).

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

25572340 is a wasteful number, since it uses less digits than its factorization.

25572340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278626 (or 1278624 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25572340 is about 5056.9101237811. The cubic root of 25572340 is about 294.6163354815.

Adding to 25572340 its reverse (4327552), we get a palindrome (29899892).

The spelling of 25572340 in words is "twenty-five million, five hundred seventy-two thousand, three hundred forty".