31264042 has 4 divisors (see below), whose sum is σ = 46896066. Its totient is φ = 15632020.

The previous prime is 31264039. The next prime is 31264043. The reversal of 31264042 is 24046213.

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: 24046213 = 41 ⋅586493.

It can be written as a sum of positive squares in only one way, i.e., 31259281 + 4761 = 5591^2 + 69^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (31264043) 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, 7816009 + ... + 7816012.

Almost surely, 2^31264042 is an apocalyptic number.

31264042 is a deficient number, since it is larger than the sum of its proper divisors (15632024).

31264042 is a wasteful number, since it uses less digits than its factorization.

31264042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15632023.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 31264042 is about 5591.4257573538. The cubic root of 31264042 is about 315.0274335728.

The spelling of 31264042 in words is "thirty-one million, two hundred sixty-four thousand, forty-two".