42121136 has 20 divisors (see below), whose sum is σ = 82026000. Its totient is φ = 20953152.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121136 is 63112124.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3431 + ... + 9798.

It is an arithmetic number, because the mean of its divisors is an integer number (4101300).

Almost surely, 2^42121136 is an apocalyptic number.

It is an amenable number.

42121136 is a deficient number, since it is larger than the sum of its proper divisors (39904864).

42121136 is a wasteful number, since it uses less digits than its factorization.

42121136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436 (or 13430 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 42121136 is about 6490.0798146094. The cubic root of 42121136 is about 347.9365278171.

The spelling of 42121136 in words is "forty-two million, one hundred twenty-one thousand, one hundred thirty-six".