715536421 has 4 divisors (see below), whose sum is σ = 716942700. Its totient is φ = 714130144.

The previous prime is 715536403. The next prime is 715536431. The reversal of 715536421 is 124635517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124635517 = 17 ⋅7331501.

It can be written as a sum of positive squares in 2 ways, for example, as 354004225 + 361532196 = 18815^2 + 19014^2 .

It is a cyclic number.

It is not a de Polignac number, because 715536421 - 2²³ = 707147813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715536431) 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 3 ways as a sum of consecutive naturals, for example, 702376 + ... + 703393.

It is an arithmetic number, because the mean of its divisors is an integer number (179235675).

Almost surely, 2^715536421 is an apocalyptic number.

It is an amenable number.

715536421 is a deficient number, since it is larger than the sum of its proper divisors (1406279).

715536421 is a wasteful number, since it uses less digits than its factorization.

715536421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406278.

The product of its digits is 25200, while the sum is 34.

The square root of 715536421 is about 26749.5125376146. The cubic root of 715536421 is about 894.4249694111.

The spelling of 715536421 in words is "seven hundred fifteen million, five hundred thirty-six thousand, four hundred twenty-one".