291056 has 10 divisors (see below), whose sum is σ = 563952. Its totient is φ = 145520.

The previous prime is 291043. The next prime is 291077. The reversal of 291056 is 650192.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291056.

It is an unprimeable number.

291056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9080 + ... + 9111.

2²⁹¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

291056 is a deficient number, since it is larger than the sum of its proper divisors (272896).

291056 is a wasteful number, since it uses less digits than its factorization.

291056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18199 (or 18193 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 291056 is about 539.4960611534. The cubic root of 291056 is about 66.2713044097.

The spelling of 291056 in words is "two hundred ninety-one thousand, fifty-six".