297242921 has 4 divisors (see below), whose sum is σ = 302851332. Its totient is φ = 291634512.

The previous prime is 297242903. The next prime is 297242929. The reversal of 297242921 is 129242792.

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 241367296 + 55875625 = 15536^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 297242921 - 2¹⁰ = 297241897 is a prime.

It is a super-2 number, since 2×297242921² = 176706708169224482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (297242929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804126 + ... + 2804231.

It is an arithmetic number, because the mean of its divisors is an integer number (75712833).

Almost surely, 2^297242921 is an apocalyptic number.

It is an amenable number.

297242921 is a deficient number, since it is larger than the sum of its proper divisors (5608411).

297242921 is an equidigital number, since it uses as much as digits as its factorization.

297242921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608410.

The product of its digits is 36288, while the sum is 38.

The square root of 297242921 is about 17240.7343521093. The cubic root of 297242921 is about 667.3758804506.

The spelling of 297242921 in words is "two hundred ninety-seven million, two hundred forty-two thousand, nine hundred twenty-one".