42042577 has 4 divisors (see below), whose sum is σ = 42080256. Its totient is φ = 42004900.

The previous prime is 42042569. The next prime is 42042587. The reversal of 42042577 is 77524024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42042577 - 2³ = 42042569 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42042527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17113 + ... + 19414.

It is an arithmetic number, because the mean of its divisors is an integer number (10520064).

Almost surely, 2^42042577 is an apocalyptic number.

It is an amenable number.

42042577 is a deficient number, since it is larger than the sum of its proper divisors (37679).

42042577 is a wasteful number, since it uses less digits than its factorization.

42042577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37678.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 42042577 is about 6484.0247531915. The cubic root of 42042577 is about 347.7200841743.

The spelling of 42042577 in words is "forty-two million, forty-two thousand, five hundred seventy-seven".