42567639 has 8 divisors (see below), whose sum is σ = 57827952. Its totient is φ = 27842880.

The previous prime is 42567631. The next prime is 42567653. The reversal of 42567639 is 93676524.

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

It is not a de Polignac number, because 42567639 - 2³ = 42567631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42567639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42567631) 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, 133702 + ... + 134019.

It is an arithmetic number, because the mean of its divisors is an integer number (7228494).

Almost surely, 2^42567639 is an apocalyptic number.

42567639 is a deficient number, since it is larger than the sum of its proper divisors (15260313).

42567639 is a wasteful number, since it uses less digits than its factorization.

42567639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267777.

The product of its digits is 272160, while the sum is 42.

The square root of 42567639 is about 6524.3880172779. The cubic root of 42567639 is about 349.1616369907.

The spelling of 42567639 in words is "forty-two million, five hundred sixty-seven thousand, six hundred thirty-nine".