712140021 has 12 divisors (see below), whose sum is σ = 1030086720. Its totient is φ = 474095400.

The previous prime is 712139993. The next prime is 712140031. The reversal of 712140021 is 120041217.

It is not a de Polignac number, because 712140021 - 2¹⁷ = 712008949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 712139976 and 712140003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712140031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48555 + ... + 61496.

It is an arithmetic number, because the mean of its divisors is an integer number (85840560).

Almost surely, 2^712140021 is an apocalyptic number.

It is an amenable number.

712140021 is a deficient number, since it is larger than the sum of its proper divisors (317946699).

712140021 is a wasteful number, since it uses less digits than its factorization.

712140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110776 (or 110773 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 712140021 is about 26685.9517536849. The cubic root of 712140021 is about 893.0075506803.

Adding to 712140021 its reverse (120041217), we get a palindrome (832181238).

The spelling of 712140021 in words is "seven hundred twelve million, one hundred forty thousand, twenty-one".