42137887 has 6 divisors (see below), whose sum is σ = 46316984. Its totient is φ = 38307060.

The previous prime is 42137869. The next prime is 42137891. The reversal of 42137887 is 78873124.

It is a de Polignac number, because none of the positive numbers 2^k-42137887 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 (42137287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174003 + ... + 174244.

Almost surely, 2^42137887 is an apocalyptic number.

42137887 is a deficient number, since it is larger than the sum of its proper divisors (4179097).

42137887 is a wasteful number, since it uses less digits than its factorization.

42137887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348269 (or 348258 counting only the distinct ones).

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

The square root of 42137887 is about 6491.3701943426. The cubic root of 42137887 is about 347.9826449045.

It can be divided in two parts, 4213 and 7887, that added together give a square (12100 = 110²).

The spelling of 42137887 in words is "forty-two million, one hundred thirty-seven thousand, eight hundred eighty-seven".