712071021 has 4 divisors (see below), whose sum is σ = 949428032. Its totient is φ = 474714012.

The previous prime is 712071011. The next prime is 712071071. The reversal of 712071021 is 120170217.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 120170217 = 3 ⋅40056739.

It is not a de Polignac number, because 712071021 - 2⁹ = 712070509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712071001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118678501 + ... + 118678506.

It is an arithmetic number, because the mean of its divisors is an integer number (237357008).

Almost surely, 2^712071021 is an apocalyptic number.

It is an amenable number.

712071021 is a deficient number, since it is larger than the sum of its proper divisors (237357011).

712071021 is a wasteful number, since it uses less digits than its factorization.

712071021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237357010.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 712071021 is about 26684.6589073198. The cubic root of 712071021 is about 892.9787082666.

The spelling of 712071021 in words is "seven hundred twelve million, seventy-one thousand, twenty-one".