25457213 has 2 divisors, whose sum is σ = 25457214. Its totient is φ = 25457212.

The previous prime is 25457167. The next prime is 25457233. The reversal of 25457213 is 31275452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24970009 + 487204 = 4997^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 25457213 - 2⁶ = 25457149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25457233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728606 + 12728607.

It is an arithmetic number, because the mean of its divisors is an integer number (12728607).

Almost surely, 2^25457213 is an apocalyptic number.

It is an amenable number.

25457213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457213 is an equidigital number, since it uses as much as digits as its factorization.

25457213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 25457213 is about 5045.5141462491. The cubic root of 25457213 is about 294.1735481738.

The spelling of 25457213 in words is "twenty-five million, four hundred fifty-seven thousand, two hundred thirteen".