42138877 has 8 divisors (see below), whose sum is σ = 46120320. Its totient is φ = 38182560.

The previous prime is 42138799. The next prime is 42138881. The reversal of 42138877 is 77883124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42138877 is a prime.

It is a super-2 number, since 2×42138877² = 3551369909642258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42138077) 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, 2677 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (5765040).

Almost surely, 2^42138877 is an apocalyptic number.

It is an amenable number.

42138877 is a deficient number, since it is larger than the sum of its proper divisors (3981443).

42138877 is a wasteful number, since it uses less digits than its factorization.

42138877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563.

The product of its digits is 75264, while the sum is 40.

The square root of 42138877 is about 6491.4464489819. The cubic root of 42138877 is about 347.9853700856.

The spelling of 42138877 in words is "forty-two million, one hundred thirty-eight thousand, eight hundred seventy-seven".