42012104 has 8 divisors (see below), whose sum is σ = 78772710. Its totient is φ = 21006048.

The previous prime is 42012079. The next prime is 42012107. The reversal of 42012104 is 40121024.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 1435204 = 6370^2 + 1198^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42012107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625749 + ... + 2625764.

Almost surely, 2^42012104 is an apocalyptic number.

It is an amenable number.

42012104 is a deficient number, since it is larger than the sum of its proper divisors (36760606).

42012104 is a wasteful number, since it uses less digits than its factorization.

42012104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251519 (or 5251515 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42012104 is about 6481.6744750103. The cubic root of 42012104 is about 347.6360532072.

Adding to 42012104 its reverse (40121024), we get a palindrome (82133128).

The spelling of 42012104 in words is "forty-two million, twelve thousand, one hundred four".