712004021 has 4 divisors (see below), whose sum is σ = 712058592. Its totient is φ = 711949452.

The previous prime is 712003997. The next prime is 712004053. The reversal of 712004021 is 120400217.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712004021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712004071) 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, 5096 + ... + 38078.

It is an arithmetic number, because the mean of its divisors is an integer number (178014648).

Almost surely, 2^712004021 is an apocalyptic number.

It is an amenable number.

712004021 is a deficient number, since it is larger than the sum of its proper divisors (54571).

712004021 is a wasteful number, since it uses less digits than its factorization.

712004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54570.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 712004021 is about 26683.4034748193. The cubic root of 712004021 is about 892.9507000819.

Adding to 712004021 its reverse (120400217), we get a palindrome (832404238).

The spelling of 712004021 in words is "seven hundred twelve million, four thousand, twenty-one".