25212013 has 2 divisors, whose sum is σ = 25212014. Its totient is φ = 25212012.

The previous prime is 25212001. The next prime is 25212023. The reversal of 25212013 is 31021252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24631369 + 580644 = 4963^2 + 762^2 .

It is a cyclic number.

It is not a de Polignac number, because 25212013 - 2¹⁷ = 25080941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606006 + 12606007.

It is an arithmetic number, because the mean of its divisors is an integer number (12606007).

Almost surely, 2^25212013 is an apocalyptic number.

It is an amenable number.

25212013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212013 is an equidigital number, since it uses as much as digits as its factorization.

25212013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 25212013 is about 5021.1565400812. The cubic root of 25212013 is about 293.2260212086.

Adding to 25212013 its reverse (31021252), we get a palindrome (56233265).

The spelling of 25212013 in words is "twenty-five million, two hundred twelve thousand, thirteen".