712721145 has 16 divisors (see below), whose sum is σ = 1151646912. Its totient is φ = 376353600.

The previous prime is 712721131. The next prime is 712721147. The reversal of 712721145 is 541127217.

It is not a de Polignac number, because 712721145 - 2⁷ = 712721017 is a prime.

It is a super-2 number, since 2×712721145² = 1015942861060222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (712721147) 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 15 ways as a sum of consecutive naturals, for example, 233707 + ... + 236736.

It is an arithmetic number, because the mean of its divisors is an integer number (71977932).

Almost surely, 2^712721145 is an apocalyptic number.

It is an amenable number.

712721145 is a deficient number, since it is larger than the sum of its proper divisors (438925767).

712721145 is a wasteful number, since it uses less digits than its factorization.

712721145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470552.

The product of its digits is 3920, while the sum is 30.

The square root of 712721145 is about 26696.8377340838. The cubic root of 712721145 is about 893.2503901081.

The spelling of 712721145 in words is "seven hundred twelve million, seven hundred twenty-one thousand, one hundred forty-five".