31142042 has 16 divisors (see below), whose sum is σ = 49400064. Its totient is φ = 14700000.

The previous prime is 31142039. The next prime is 31142077. The reversal of 31142042 is 24024113.

It is a self number, because there is not a number n which added to its sum of digits gives 31142042.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3584 + ... + 8667.

It is an arithmetic number, because the mean of its divisors is an integer number (3087504).

Almost surely, 2^31142042 is an apocalyptic number.

31142042 is a deficient number, since it is larger than the sum of its proper divisors (18258022).

31142042 is a wasteful number, since it uses less digits than its factorization.

31142042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12325.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31142042 is about 5580.5055326556. The cubic root of 31142042 is about 314.6171278325.

Adding to 31142042 its reverse (24024113), we get a palindrome (55166155).

The spelling of 31142042 in words is "thirty-one million, one hundred forty-two thousand, forty-two".