312605042 has 4 divisors (see below), whose sum is σ = 468907566. Its totient is φ = 156302520.

The previous prime is 312605021. The next prime is 312605047. The reversal of 312605042 is 240506213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240506213 = 89 ⋅2702317.

It can be written as a sum of positive squares in only one way, i.e., 310499641 + 2105401 = 17621^2 + 1451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312604999 and 312605017.

It is not an unprimeable number, because it can be changed into a prime (312605047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78151259 + ... + 78151262.

Almost surely, 2^312605042 is an apocalyptic number.

312605042 is a deficient number, since it is larger than the sum of its proper divisors (156302524).

312605042 is a wasteful number, since it uses less digits than its factorization.

312605042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156302523.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 312605042 is about 17680.6403164591. The cubic root of 312605042 is about 678.6804297258.

The spelling of 312605042 in words is "three hundred twelve million, six hundred five thousand, forty-two".