715891 has 8 divisors (see below), whose sum is σ = 787968. Its totient is φ = 645000.

The previous prime is 715889. The next prime is 715903. The reversal of 715891 is 198517.

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 715891 - 2¹ = 715889 is a prime.

It is a Duffinian number.

715891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (715801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 1876.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2⁷¹⁵⁸⁹¹ is an apocalyptic number.

715891 is a deficient number, since it is larger than the sum of its proper divisors (72077).

715891 is a wasteful number, since it uses less digits than its factorization.

715891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its digits is 2520, while the sum is 31.

The square root of 715891 is about 846.1034215745. The cubic root of 715891 is about 89.4572686998.

The spelling of 715891 in words is "seven hundred fifteen thousand, eight hundred ninety-one".