42121736 has 16 divisors (see below), whose sum is σ = 79221840. Its totient is φ = 20995920.

The previous prime is 42121721. The next prime is 42121741. The reversal of 42121736 is 63712124.

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, 5306 + ... + 10601.

It is an arithmetic number, because the mean of its divisors is an integer number (4951365).

Almost surely, 2^42121736 is an apocalyptic number.

It is an amenable number.

42121736 is a deficient number, since it is larger than the sum of its proper divisors (37100104).

42121736 is a wasteful number, since it uses less digits than its factorization.

42121736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16244 (or 16240 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 42121736 is about 6490.1260388378. The cubic root of 42121736 is about 347.9381798849.

The spelling of 42121736 in words is "forty-two million, one hundred twenty-one thousand, seven hundred thirty-six".