42138767 has 8 divisors (see below), whose sum is σ = 48673872. Its totient is φ = 36054400.

The previous prime is 42138689. The next prime is 42138781. The reversal of 42138767 is 76783124.

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 42138767 - 2¹² = 42134671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42138767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42138787) 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, 112484 + ... + 112857.

It is an arithmetic number, because the mean of its divisors is an integer number (6084234).

Almost surely, 2^42138767 is an apocalyptic number.

42138767 is a deficient number, since it is larger than the sum of its proper divisors (6535105).

42138767 is a wasteful number, since it uses less digits than its factorization.

42138767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225369.

The product of its digits is 56448, while the sum is 38.

The square root of 42138767 is about 6491.4379762885. The cubic root of 42138767 is about 347.9850672898.

The spelling of 42138767 in words is "forty-two million, one hundred thirty-eight thousand, seven hundred sixty-seven".