25405013 has 2 divisors, whose sum is σ = 25405014. Its totient is φ = 25405012.

The previous prime is 25404997. The next prime is 25405019. The reversal of 25405013 is 31050452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18861649 + 6543364 = 4343^2 + 2558^2 .

It is a cyclic number.

It is not a de Polignac number, because 25405013 - 2⁴ = 25404997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25405019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12702506 + 12702507.

It is an arithmetic number, because the mean of its divisors is an integer number (12702507).

Almost surely, 2^25405013 is an apocalyptic number.

It is an amenable number.

25405013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25405013 is an equidigital number, since it uses as much as digits as its factorization.

25405013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25405013 is about 5040.3385798972. The cubic root of 25405013 is about 293.9723430259.

Adding to 25405013 its reverse (31050452), we get a palindrome (56455465).

The spelling of 25405013 in words is "twenty-five million, four hundred five thousand, thirteen".