42021937 has 4 divisors (see below), whose sum is σ = 42037056. Its totient is φ = 42006820.

The previous prime is 42021923. The next prime is 42021949. The reversal of 42021937 is 73912024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42021937 - 2¹¹ = 42019889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053 + ... + 9394.

It is an arithmetic number, because the mean of its divisors is an integer number (10509264).

Almost surely, 2^42021937 is an apocalyptic number.

It is an amenable number.

42021937 is a deficient number, since it is larger than the sum of its proper divisors (15119).

42021937 is a wasteful number, since it uses less digits than its factorization.

42021937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15118.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 42021937 is about 6482.4329537605. The cubic root of 42021937 is about 347.6631726826.

The spelling of 42021937 in words is "forty-two million, twenty-one thousand, nine hundred thirty-seven".