42637021 has 8 divisors (see below), whose sum is σ = 48847680. Its totient is φ = 36456288.

The previous prime is 42637019. The next prime is 42637027. The reversal of 42637021 is 12073624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42637021 - 2¹ = 42637019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42637027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4336 + ... + 10201.

It is an arithmetic number, because the mean of its divisors is an integer number (6105960).

Almost surely, 2^42637021 is an apocalyptic number.

It is an amenable number.

42637021 is a deficient number, since it is larger than the sum of its proper divisors (6210659).

42637021 is a wasteful number, since it uses less digits than its factorization.

42637021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14963.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 42637021 is about 6529.7029794624. The cubic root of 42637021 is about 349.3512362829.

The spelling of 42637021 in words is "forty-two million, six hundred thirty-seven thousand, twenty-one".