291360121 has 4 divisors (see below), whose sum is σ = 313772452. Its totient is φ = 268947792.

The previous prime is 291360107. The next prime is 291360143. The reversal of 291360121 is 121063192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127238400 + 164121721 = 11280^2 + 12811^2 .

It is a cyclic number.

It is not a de Polignac number, because 291360121 - 2¹⁵ = 291327353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291360151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11206146 + ... + 11206171.

It is an arithmetic number, because the mean of its divisors is an integer number (78443113).

Almost surely, 2^291360121 is an apocalyptic number.

It is an amenable number.

291360121 is a deficient number, since it is larger than the sum of its proper divisors (22412331).

291360121 is a wasteful number, since it uses less digits than its factorization.

291360121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22412330.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 291360121 is about 17069.2741790622. The cubic root of 291360121 is about 662.9437841116.

The spelling of 291360121 in words is "two hundred ninety-one million, three hundred sixty thousand, one hundred twenty-one".