42165790 has 8 divisors (see below), whose sum is σ = 75898440. Its totient is φ = 16866312.

The previous prime is 42165787. The next prime is 42165791. The reversal of 42165790 is 9756124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165791) 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, 2108280 + ... + 2108299.

It is an arithmetic number, because the mean of its divisors is an integer number (9487305).

Almost surely, 2^42165790 is an apocalyptic number.

42165790 is a deficient number, since it is larger than the sum of its proper divisors (33732650).

42165790 is a wasteful number, since it uses less digits than its factorization.

42165790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216586.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 42165790 is about 6493.5190767411. The cubic root of 42165790 is about 348.0594373749.

The spelling of 42165790 in words is "forty-two million, one hundred sixty-five thousand, seven hundred ninety".