25570013 has 12 divisors (see below), whose sum is σ = 29827872. Its totient is φ = 21855960.

The previous prime is 25570007. The next prime is 25570031. The reversal of 25570013 is 31007552.

It is not a de Polignac number, because 25570013 - 2⁸ = 25569757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25570033) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 30506 + ... + 31332.

It is an arithmetic number, because the mean of its divisors is an integer number (2485656).

Almost surely, 2^25570013 is an apocalyptic number.

It is an amenable number.

25570013 is a deficient number, since it is larger than the sum of its proper divisors (4257859).

25570013 is an equidigital number, since it uses as much as digits as its factorization.

25570013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 25570013 is about 5056.6800373368. The cubic root of 25570013 is about 294.6073988334.

Adding to 25570013 its reverse (31007552), we get a palindrome (56577565).

The spelling of 25570013 in words is "twenty-five million, five hundred seventy thousand, thirteen".