712101521 has 4 divisors (see below), whose sum is σ = 719015232. Its totient is φ = 705187812.

The previous prime is 712101463. The next prime is 712101539. The reversal of 712101521 is 125101217.

It is a happy number.

712101521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-712101521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 712101493 and 712101502.

It is not an unprimeable number, because it can be changed into a prime (712101581) 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, 3456701 + ... + 3456906.

It is an arithmetic number, because the mean of its divisors is an integer number (179753808).

Almost surely, 2^712101521 is an apocalyptic number.

It is an amenable number.

712101521 is a deficient number, since it is larger than the sum of its proper divisors (6913711).

712101521 is a wasteful number, since it uses less digits than its factorization.

712101521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913710.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 712101521 is about 26685.2303906112. The cubic root of 712101521 is about 892.9914576792.

Adding to 712101521 its reverse (125101217), we get a palindrome (837202738).

The spelling of 712101521 in words is "seven hundred twelve million, one hundred one thousand, five hundred twenty-one".