313542121 has 4 divisors (see below), whose sum is σ = 316774612. Its totient is φ = 310309632.

The previous prime is 313542083. The next prime is 313542127. The reversal of 313542121 is 121245313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121245313 = 7 ⋅17320759.

It can be written as a sum of positive squares in 2 ways, for example, as 119246400 + 194295721 = 10920^2 + 13939^2 .

It is a cyclic number.

It is not a de Polignac number, because 313542121 - 2²⁵ = 279987689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313542092 and 313542101.

It is not an unprimeable number, because it can be changed into a prime (313542127) 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 3 ways as a sum of consecutive naturals, for example, 1616100 + ... + 1616293.

It is an arithmetic number, because the mean of its divisors is an integer number (79193653).

Almost surely, 2^313542121 is an apocalyptic number.

It is an amenable number.

313542121 is a deficient number, since it is larger than the sum of its proper divisors (3232491).

313542121 is an equidigital number, since it uses as much as digits as its factorization.

313542121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232490.

The product of its digits is 720, while the sum is 22.

The square root of 313542121 is about 17707.1206298483. The cubic root of 313542121 is about 679.3579009448.

Adding to 313542121 its reverse (121245313), we get a palindrome (434787434).

The spelling of 313542121 in words is "three hundred thirteen million, five hundred forty-two thousand, one hundred twenty-one".