715861 has 4 divisors (see below), whose sum is σ = 718272. Its totient is φ = 713452.

The previous prime is 715859. The next prime is 715867. The reversal of 715861 is 168517.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168517 = 43 ⋅3919.

It is a cyclic number.

It is not a de Polignac number, because 715861 - 2¹ = 715859 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 (715867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685 + ... + 1378.

It is an arithmetic number, because the mean of its divisors is an integer number (179568).

2⁷¹⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

715861 is a deficient number, since it is larger than the sum of its proper divisors (2411).

715861 is a wasteful number, since it uses less digits than its factorization.

715861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410.

The product of its digits is 1680, while the sum is 28.

The square root of 715861 is about 846.0856930595. The cubic root of 715861 is about 89.4560190889.

The spelling of 715861 in words is "seven hundred fifteen thousand, eight hundred sixty-one".