25470257 has 2 divisors, whose sum is σ = 25470258. Its totient is φ = 25470256.

The previous prime is 25470253. The next prime is 25470337. The reversal of 25470257 is 75207452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19324816 + 6145441 = 4396^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 25470257 - 2² = 25470253 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25470253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12735128 + 12735129.

It is an arithmetic number, because the mean of its divisors is an integer number (12735129).

Almost surely, 2^25470257 is an apocalyptic number.

It is an amenable number.

25470257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25470257 is an equidigital number, since it uses as much as digits as its factorization.

25470257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 25470257 is about 5046.8066140878. The cubic root of 25470257 is about 294.2237833739.

The spelling of 25470257 in words is "twenty-five million, four hundred seventy thousand, two hundred fifty-seven".