712766521 has 4 divisors (see below), whose sum is σ = 717034752. Its totient is φ = 708498292.

The previous prime is 712766507. The next prime is 712766543. The reversal of 712766521 is 125667217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 712766521 - 2⁹ = 712766009 is a prime.

It is a super-3 number, since 3×712766521³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712766501) 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, 2133865 + ... + 2134198.

It is an arithmetic number, because the mean of its divisors is an integer number (179258688).

Almost surely, 2^712766521 is an apocalyptic number.

It is an amenable number.

712766521 is a deficient number, since it is larger than the sum of its proper divisors (4268231).

712766521 is a wasteful number, since it uses less digits than its factorization.

712766521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268230.

The product of its digits is 35280, while the sum is 37.

The square root of 712766521 is about 26697.6875590378. The cubic root of 712766521 is about 893.2693462219.

The spelling of 712766521 in words is "seven hundred twelve million, seven hundred sixty-six thousand, five hundred twenty-one".