291365121 has 8 divisors (see below), whose sum is σ = 398986624. Its totient is φ = 188993520.

The previous prime is 291365099. The next prime is 291365131. The reversal of 291365121 is 121563192.

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

It is not a de Polignac number, because 291365121 - 2⁵ = 291365089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291365131) 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, 1312345 + ... + 1312566.

It is an arithmetic number, because the mean of its divisors is an integer number (49873328).

Almost surely, 2^291365121 is an apocalyptic number.

It is an amenable number.

291365121 is a deficient number, since it is larger than the sum of its proper divisors (107621503).

291365121 is a wasteful number, since it uses less digits than its factorization.

291365121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624951.

The product of its digits is 3240, while the sum is 30.

The square root of 291365121 is about 17069.4206404318. The cubic root of 291365121 is about 662.9475763258.

The spelling of 291365121 in words is "two hundred ninety-one million, three hundred sixty-five thousand, one hundred twenty-one".