42511977 has 12 divisors (see below), whose sum is σ = 61626864. Its totient is φ = 28239480.

The previous prime is 42511967. The next prime is 42511991. The reversal of 42511977 is 77911524.

It is a happy number.

It is not a de Polignac number, because 42511977 - 2⁴ = 42511961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42511967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5799 + ... + 10892.

It is an arithmetic number, because the mean of its divisors is an integer number (5135572).

Almost surely, 2^42511977 is an apocalyptic number.

It is an amenable number.

42511977 is a deficient number, since it is larger than the sum of its proper divisors (19114887).

42511977 is a wasteful number, since it uses less digits than its factorization.

42511977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16980 (or 16977 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 42511977 is about 6520.1209344613. The cubic root of 42511977 is about 349.0093811705.

The spelling of 42511977 in words is "forty-two million, five hundred eleven thousand, nine hundred seventy-seven".