42139269 has 12 divisors (see below), whose sum is σ = 62283936. Its totient is φ = 27439272.

The previous prime is 42139259. The next prime is 42139309. The reversal of 42139269 is 96293124.

42139269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42139269 - 2²⁴ = 25362053 is a prime.

It is a super-2 number, since 2×42139269² = 3551435983708722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42139219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54057 + ... + 54830.

It is an arithmetic number, because the mean of its divisors is an integer number (5190328).

Almost surely, 2^42139269 is an apocalyptic number.

It is an amenable number.

42139269 is a deficient number, since it is larger than the sum of its proper divisors (20144667).

42139269 is a wasteful number, since it uses less digits than its factorization.

42139269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108936 (or 108933 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 42139269 is about 6491.4766424905. The cubic root of 42139269 is about 347.9864491354.

The spelling of 42139269 in words is "forty-two million, one hundred thirty-nine thousand, two hundred sixty-nine".