42031942 has 4 divisors (see below), whose sum is σ = 63047916. Its totient is φ = 21015970.

The previous prime is 42031937. The next prime is 42031949. The reversal of 42031942 is 24913024.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507984 + ... + 10507987.

It is an arithmetic number, because the mean of its divisors is an integer number (15761979).

Almost surely, 2^42031942 is an apocalyptic number.

42031942 is a deficient number, since it is larger than the sum of its proper divisors (21015974).

42031942 is a wasteful number, since it uses less digits than its factorization.

42031942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015973.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 42031942 is about 6483.2046088335. The cubic root of 42031942 is about 347.6907621931.

Adding to 42031942 its reverse (24913024), we get a palindrome (66944966).

The spelling of 42031942 in words is "forty-two million, thirty-one thousand, nine hundred forty-two".