42636657 has 8 divisors (see below), whose sum is σ = 64970176. Its totient is φ = 24363792.

The previous prime is 42636637. The next prime is 42636667. The reversal of 42636657 is 75663624.

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

It is not a de Polignac number, because 42636657 - 2⁶ = 42636593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42636637) 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, 1015138 + ... + 1015179.

It is an arithmetic number, because the mean of its divisors is an integer number (8121272).

Almost surely, 2^42636657 is an apocalyptic number.

It is an amenable number.

42636657 is a deficient number, since it is larger than the sum of its proper divisors (22333519).

42636657 is a wasteful number, since it uses less digits than its factorization.

42636657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030327.

The product of its digits is 181440, while the sum is 39.

The square root of 42636657 is about 6529.6751067722. The cubic root of 42636657 is about 349.3502421218.

The spelling of 42636657 in words is "forty-two million, six hundred thirty-six thousand, six hundred fifty-seven".