872291 has 8 divisors (see below), whose sum is σ = 1031520. Its totient is φ = 721728.

The previous prime is 872281. The next prime is 872317. The reversal of 872291 is 192278.

872291 = 350² + 351² + ... + 356².

It is a happy number.

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

It is not a de Polignac number, because 872291 - 2⁶ = 872227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 872291.

It is not an unprimeable number, because it can be changed into a prime (872231) 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, 1946 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (128940).

2⁸⁷²²⁹¹ is an apocalyptic number.

872291 is a deficient number, since it is larger than the sum of its proper divisors (159229).

872291 is a wasteful number, since it uses less digits than its factorization.

872291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333.

The product of its digits is 2016, while the sum is 29.

The square root of 872291 is about 933.9652027779. The cubic root of 872291 is about 95.5477498481.

The spelling of 872291 in words is "eight hundred seventy-two thousand, two hundred ninety-one".