42638527 has 8 divisors (see below), whose sum is σ = 46834560. Its totient is φ = 38637720.

The previous prime is 42638521. The next prime is 42638543. The reversal of 42638527 is 72583624.

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 42638527 - 2¹⁹ = 42114239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42638521) 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, 48349 + ... + 49222.

It is an arithmetic number, because the mean of its divisors is an integer number (5854320).

Almost surely, 2^42638527 is an apocalyptic number.

42638527 is a deficient number, since it is larger than the sum of its proper divisors (4196033).

42638527 is a wasteful number, since it uses less digits than its factorization.

42638527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97613.

The product of its digits is 80640, while the sum is 37.

The square root of 42638527 is about 6529.8182976251. The cubic root of 42638527 is about 349.3553494281.

It can be divided in two parts, 4263 and 8527, that multiplied together give a triangular number (36350601 = T₈₅₂₆).

The spelling of 42638527 in words is "forty-two million, six hundred thirty-eight thousand, five hundred twenty-seven".