712142321 has 4 divisors (see below), whose sum is σ = 776882544. Its totient is φ = 647402100.

The previous prime is 712142317. The next prime is 712142339. The reversal of 712142321 is 123241217.

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 712142321 - 2² = 712142317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712142341) 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, 32370095 + ... + 32370116.

It is an arithmetic number, because the mean of its divisors is an integer number (194220636).

Almost surely, 2^712142321 is an apocalyptic number.

It is an amenable number.

712142321 is a deficient number, since it is larger than the sum of its proper divisors (64740223).

712142321 is a wasteful number, since it uses less digits than its factorization.

712142321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64740222.

The product of its digits is 672, while the sum is 23.

The square root of 712142321 is about 26685.9948474851. The cubic root of 712142321 is about 893.0085120620.

Adding to 712142321 its reverse (123241217), we get a palindrome (835383538).

The spelling of 712142321 in words is "seven hundred twelve million, one hundred forty-two thousand, three hundred twenty-one".