312520042 has 4 divisors (see below), whose sum is σ = 468780066. Its totient is φ = 156260020.

The previous prime is 312519973. The next prime is 312520049. The reversal of 312520042 is 240025213.

312520042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 242144721 + 70375321 = 15561^2 + 8389^2 .

It is not an unprimeable number, because it can be changed into a prime (312520049) 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 as a sum of consecutive naturals, namely, 78130009 + ... + 78130012.

Almost surely, 2^312520042 is an apocalyptic number.

312520042 is a deficient number, since it is larger than the sum of its proper divisors (156260024).

312520042 is a wasteful number, since it uses less digits than its factorization.

312520042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156260023.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 312520042 is about 17678.2363939393. The cubic root of 312520042 is about 678.6189111340.

Adding to 312520042 its reverse (240025213), we get a palindrome (552545255).

The spelling of 312520042 in words is "three hundred twelve million, five hundred twenty thousand, forty-two".