712528921 has 8 divisors (see below), whose sum is σ = 767551680. Its totient is φ = 657536592.

The previous prime is 712528907. The next prime is 712528933. The reversal of 712528921 is 129825217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 712528921 - 2⁷ = 712528793 is a prime.

It is a super-2 number, since 2×712528921² = 1015394926522848482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712528951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71766 + ... + 81088.

It is an arithmetic number, because the mean of its divisors is an integer number (95943960).

Almost surely, 2^712528921 is an apocalyptic number.

It is an amenable number.

712528921 is a deficient number, since it is larger than the sum of its proper divisors (55022759).

712528921 is a wasteful number, since it uses less digits than its factorization.

712528921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15215.

The product of its digits is 20160, while the sum is 37.

The square root of 712528921 is about 26693.2373645461. The cubic root of 712528921 is about 893.1700783793.

It can be divided in two parts, 7125 and 28921, that added together give a triangular number (36046 = T₂₆₈).

The spelling of 712528921 in words is "seven hundred twelve million, five hundred twenty-eight thousand, nine hundred twenty-one".