42052109 has 4 divisors (see below), whose sum is σ = 45875040. Its totient is φ = 38229180.

The previous prime is 42052079. The next prime is 42052147. The reversal of 42052109 is 90125024.

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 not a de Polignac number, because 42052109 - 2⁸ = 42051853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42054109) 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, 1911449 + ... + 1911470.

It is an arithmetic number, because the mean of its divisors is an integer number (11468760).

Almost surely, 2^42052109 is an apocalyptic number.

It is an amenable number.

42052109 is a deficient number, since it is larger than the sum of its proper divisors (3822931).

42052109 is a wasteful number, since it uses less digits than its factorization.

42052109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822930.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 42052109 is about 6484.7597488265. The cubic root of 42052109 is about 347.7463608492.

The spelling of 42052109 in words is "forty-two million, fifty-two thousand, one hundred nine".