312634121 has 4 divisors (see below), whose sum is σ = 318532932. Its totient is φ = 306735312.

The previous prime is 312634099. The next prime is 312634129. The reversal of 312634121 is 121436213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121436213 = 1171 ⋅103703.

It can be written as a sum of positive squares in 2 ways, for example, as 258405625 + 54228496 = 16075^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 312634121 - 2¹⁸ = 312371977 is a prime.

It is a super-2 number, since 2×312634121² = 195480187226885282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (312634129) 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, 2949326 + ... + 2949431.

It is an arithmetic number, because the mean of its divisors is an integer number (79633233).

Almost surely, 2^312634121 is an apocalyptic number.

It is an amenable number.

312634121 is a deficient number, since it is larger than the sum of its proper divisors (5898811).

312634121 is an equidigital number, since it uses as much as digits as its factorization.

312634121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898810.

The product of its digits is 864, while the sum is 23.

The square root of 312634121 is about 17681.4626374630. The cubic root of 312634121 is about 678.7014730379.

The spelling of 312634121 in words is "three hundred twelve million, six hundred thirty-four thousand, one hundred twenty-one".