42642937 has 4 divisors (see below), whose sum is σ = 42656400. Its totient is φ = 42629476.

The previous prime is 42642913. The next prime is 42642967. The reversal of 42642937 is 73924624.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42642937 - 2²³ = 34254329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42642896 and 42642905.

It is not an unprimeable number, because it can be changed into a prime (42642967) 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, 918 + ... + 9280.

It is an arithmetic number, because the mean of its divisors is an integer number (10664100).

Almost surely, 2^42642937 is an apocalyptic number.

It is an amenable number.

42642937 is a deficient number, since it is larger than the sum of its proper divisors (13463).

42642937 is an equidigital number, since it uses as much as digits as its factorization.

42642937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13462.

The product of its digits is 72576, while the sum is 37.

The square root of 42642937 is about 6530.1559705722. The cubic root of 42642937 is about 349.3673933399.

The spelling of 42642937 in words is "forty-two million, six hundred forty-two thousand, nine hundred thirty-seven".