42138692 has 12 divisors (see below), whose sum is σ = 73881360. Its totient is φ = 21029736.

The previous prime is 42138689. The next prime is 42138781. The reversal of 42138692 is 29683124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7442 + ... + 11817.

It is an arithmetic number, because the mean of its divisors is an integer number (6156780).

Almost surely, 2^42138692 is an apocalyptic number.

It is an amenable number.

42138692 is a deficient number, since it is larger than the sum of its proper divisors (31742668).

42138692 is a wasteful number, since it uses less digits than its factorization.

42138692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19810 (or 19808 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 42138692 is about 6491.4321994457. The cubic root of 42138692 is about 347.9848608379.

The spelling of 42138692 in words is "forty-two million, one hundred thirty-eight thousand, six hundred ninety-two".