64253257 has 2 divisors, whose sum is σ = 64253258. Its totient is φ = 64253256.

The previous prime is 64253249. The next prime is 64253281. The reversal of 64253257 is 75235246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41011216 + 23242041 = 6404^2 + 4821^2 .

It is a cyclic number.

It is not a de Polignac number, because 64253257 - 2³ = 64253249 is a prime.

It is equal to p_3799132 and since 64253257 and 3799132 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64253227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32126628 + 32126629.

It is an arithmetic number, because the mean of its divisors is an integer number (32126629).

Almost surely, 2^64253257 is an apocalyptic number.

It is an amenable number.

64253257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64253257 is an equidigital number, since it uses as much as digits as its factorization.

64253257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 34.

The square root of 64253257 is about 8015.8129344440. The cubic root of 64253257 is about 400.5269243221.

The spelling of 64253257 in words is "sixty-four million, two hundred fifty-three thousand, two hundred fifty-seven".