42106939 has 4 divisors (see below), whose sum is σ = 48122224. Its totient is φ = 36091656.

The previous prime is 42106919. The next prime is 42106957. The reversal of 42106939 is 93960124.

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 42106939 - 2¹⁵ = 42074171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42106919) 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, 3007632 + ... + 3007645.

It is an arithmetic number, because the mean of its divisors is an integer number (12030556).

Almost surely, 2^42106939 is an apocalyptic number.

42106939 is a deficient number, since it is larger than the sum of its proper divisors (6015285).

42106939 is an equidigital number, since it uses as much as digits as its factorization.

42106939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015284.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 42106939 is about 6488.9859762524. The cubic root of 42106939 is about 347.8974325597.

The spelling of 42106939 in words is "forty-two million, one hundred six thousand, nine hundred thirty-nine".