297942121 has 9 divisors (see below), whose sum is σ = 306113349. Its totient is φ = 289984800.

The previous prime is 297942107. The next prime is 297942131. The reversal of 297942121 is 121249792.

The square root of 297942121 is 17261.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 273538521 + 24403600 = 16539^2 + 4940^2 .

It is not a de Polignac number, because 297942121 - 2⁵ = 297942089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (297942131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 707491 + ... + 707911.

Almost surely, 2^297942121 is an apocalyptic number.

297942121 is the 17261-st square number.

297942121 is the 8631-st centered octagonal number.

It is an amenable number.

297942121 is a deficient number, since it is larger than the sum of its proper divisors (8171228).

297942121 is an frugal number, since it uses more digits than its factorization.

297942121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 462 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The cubic root of 297942121 is about 667.8987567228.

The spelling of 297942121 in words is "two hundred ninety-seven million, nine hundred forty-two thousand, one hundred twenty-one".