42012404 has 36 divisors (see below), whose sum is σ = 86758560. Its totient is φ = 17745840.

The previous prime is 42012403. The next prime is 42012431. The reversal of 42012404 is 40421024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012403) 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 in 11 ways as a sum of consecutive naturals, for example, 12407 + ... + 15425.

It is an arithmetic number, because the mean of its divisors is an integer number (2409960).

Almost surely, 2^42012404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42012404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43379280).

42012404 is an abundant number, since it is smaller than the sum of its proper divisors (44746156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42012404 is a wasteful number, since it uses less digits than its factorization.

42012404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108 (or 3099 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42012404 is about 6481.6976171370. The cubic root of 42012404 is about 347.6368806717.

Adding to 42012404 its reverse (40421024), we get a palindrome (82433428).

The spelling of 42012404 in words is "forty-two million, twelve thousand, four hundred four".