42057667 has 4 divisors (see below), whose sum is σ = 42098080. Its totient is φ = 42017256.

The previous prime is 42057629. The next prime is 42057671. The reversal of 42057667 is 76675024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42057667 - 2⁷ = 42057539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42054667) 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, 18603 + ... + 20740.

It is an arithmetic number, because the mean of its divisors is an integer number (10524520).

Almost surely, 2^42057667 is an apocalyptic number.

42057667 is a deficient number, since it is larger than the sum of its proper divisors (40413).

42057667 is a wasteful number, since it uses less digits than its factorization.

42057667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40412.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 42057667 is about 6485.1882779145. The cubic root of 42057667 is about 347.7616806447.

It can be divided in two parts, 42057 and 667, that added together give a palindrome (42724).

The spelling of 42057667 in words is "forty-two million, fifty-seven thousand, six hundred sixty-seven".