712505257 has 4 divisors (see below), whose sum is σ = 729883476. Its totient is φ = 695127040.

The previous prime is 712505251. The next prime is 712505291. The reversal of 712505257 is 752505217.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 701773081 = 3276^2 + 26491^2 .

It is a cyclic number.

It is not a de Polignac number, because 712505257 - 2³ = 712505249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (712505251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8689048 + ... + 8689129.

It is an arithmetic number, because the mean of its divisors is an integer number (182470869).

Almost surely, 2^712505257 is an apocalyptic number.

It is an amenable number.

712505257 is a deficient number, since it is larger than the sum of its proper divisors (17378219).

712505257 is a wasteful number, since it uses less digits than its factorization.

712505257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17378218.

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 712505257 is about 26692.7941025289. The cubic root of 712505257 is about 893.1601904950.

The spelling of 712505257 in words is "seven hundred twelve million, five hundred five thousand, two hundred fifty-seven".