42169149 has 24 divisors (see below), whose sum is σ = 66822912. Its totient is φ = 25413120.

The previous prime is 42169139. The next prime is 42169177. The reversal of 42169149 is 94196124.

It is a happy number.

It is not a de Polignac number, because 42169149 - 2⁴ = 42169133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42169139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18004 + ... + 20210.

It is an arithmetic number, because the mean of its divisors is an integer number (2784288).

Almost surely, 2^42169149 is an apocalyptic number.

It is an amenable number.

42169149 is a deficient number, since it is larger than the sum of its proper divisors (24653763).

42169149 is a wasteful number, since it uses less digits than its factorization.

42169149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417 (or 2414 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 42169149 is about 6493.7777140891. Note that the first 4 decimals coincide. The cubic root of 42169149 is about 348.0686794691.

The spelling of 42169149 in words is "forty-two million, one hundred sixty-nine thousand, one hundred forty-nine".