715921 has 8 divisors (see below), whose sum is σ = 791424. Its totient is φ = 644160.

The previous prime is 715919. The next prime is 715927. The reversal of 715921 is 129517.

715921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 715921 - 2¹ = 715919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715927) 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, 525 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (98928).

2⁷¹⁵⁹²¹ is an apocalyptic number.

It is an amenable number.

715921 is a deficient number, since it is larger than the sum of its proper divisors (75503).

715921 is a wasteful number, since it uses less digits than its factorization.

715921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its digits is 630, while the sum is 25.

The square root of 715921 is about 846.1211497179. The cubic root of 715921 is about 89.4585182757.

The spelling of 715921 in words is "seven hundred fifteen thousand, nine hundred twenty-one".