25725013 has 2 divisors, whose sum is σ = 25725014. Its totient is φ = 25725012.

The previous prime is 25724977. The next prime is 25725019. The reversal of 25725013 is 31052752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21696964 + 4028049 = 4658^2 + 2007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25725013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25725019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862506 + 12862507.

It is an arithmetic number, because the mean of its divisors is an integer number (12862507).

Almost surely, 2^25725013 is an apocalyptic number.

It is an amenable number.

25725013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25725013 is an equidigital number, since it uses as much as digits as its factorization.

25725013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 25725013 is about 5071.9831427165. The cubic root of 25725013 is about 295.2014825818.

Adding to 25725013 its reverse (31052752), we get a palindrome (56777765).

The spelling of 25725013 in words is "twenty-five million, seven hundred twenty-five thousand, thirteen".