312744121 has 4 divisors (see below), whose sum is σ = 331140852. Its totient is φ = 294347392.

The previous prime is 312744101. The next prime is 312744127. The reversal of 312744121 is 121447213.

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 136890000 + 175854121 = 11700^2 + 13261^2 .

It is a cyclic number.

It is not a de Polignac number, because 312744121 - 2⁷ = 312743993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312744127) 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, 9198340 + ... + 9198373.

It is an arithmetic number, because the mean of its divisors is an integer number (82785213).

Almost surely, 2^312744121 is an apocalyptic number.

It is an amenable number.

312744121 is a deficient number, since it is larger than the sum of its proper divisors (18396731).

312744121 is a wasteful number, since it uses less digits than its factorization.

312744121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18396730.

The product of its digits is 1344, while the sum is 25.

The square root of 312744121 is about 17684.5729662890. The cubic root of 312744121 is about 678.7810638467.

The spelling of 312744121 in words is "three hundred twelve million, seven hundred forty-four thousand, one hundred twenty-one".