915951 has 8 divisors (see below), whose sum is σ = 1227904. Its totient is φ = 607320.

The previous prime is 915949. The next prime is 915961. The reversal of 915951 is 159519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 915951 - 2¹ = 915949 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 (915911) 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, 91 + ... + 1356.

It is an arithmetic number, because the mean of its divisors is an integer number (153488).

2⁹¹⁵⁹⁵¹ is an apocalyptic number.

915951 is a deficient number, since it is larger than the sum of its proper divisors (311953).

915951 is a wasteful number, since it uses less digits than its factorization.

915951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661.

The product of its digits is 2025, while the sum is 30.

The square root of 915951 is about 957.0532900523. The cubic root of 915951 is about 97.1159911906.

Adding to 915951 its sum of digits (30), we get a triangular number (915981 = T₁₃₅₃).

The spelling of 915951 in words is "nine hundred fifteen thousand, nine hundred fifty-one".