42031604 has 6 divisors (see below), whose sum is σ = 73555314. Its totient is φ = 21015800.

The previous prime is 42031573. The next prime is 42031607. The reversal of 42031604 is 40613024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 14047504 = 5290^2 + 3748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253947 + ... + 5253954.

It is an arithmetic number, because the mean of its divisors is an integer number (12259219).

Almost surely, 2^42031604 is an apocalyptic number.

It is an amenable number.

42031604 is a deficient number, since it is larger than the sum of its proper divisors (31523710).

42031604 is a wasteful number, since it uses less digits than its factorization.

42031604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10507905 (or 10507903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 42031604 is about 6483.1785414255. The cubic root of 42031604 is about 347.6898302052.

Adding to 42031604 its reverse (40613024), we get a palindrome (82644628).

The spelling of 42031604 in words is "forty-two million, thirty-one thousand, six hundred four".