42139792 has 10 divisors (see below), whose sum is σ = 81645878. Its totient is φ = 21069888.

The previous prime is 42139771. The next prime is 42139793. The reversal of 42139792 is 29793124.

It can be written as a sum of positive squares in only one way, i.e., 41525136 + 614656 = 6444^2 + 784^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42139793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316853 + ... + 1316884.

Almost surely, 2^42139792 is an apocalyptic number.

It is an amenable number.

42139792 is a deficient number, since it is larger than the sum of its proper divisors (39506086).

42139792 is a wasteful number, since it uses less digits than its factorization.

42139792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633745 (or 2633739 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 42139792 is about 6491.5169259581. The cubic root of 42139792 is about 347.9878887757.

The spelling of 42139792 in words is "forty-two million, one hundred thirty-nine thousand, seven hundred ninety-two".