42139677 has 8 divisors (see below), whose sum is σ = 57556800. Its totient is φ = 27407840.

The previous prime is 42139673. The next prime is 42139711. The reversal of 42139677 is 77693124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42139677 - 2² = 42139673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42139673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171177 + ... + 171422.

It is an arithmetic number, because the mean of its divisors is an integer number (7194600).

Almost surely, 2^42139677 is an apocalyptic number.

It is an amenable number.

42139677 is a deficient number, since it is larger than the sum of its proper divisors (15417123).

42139677 is a wasteful number, since it uses less digits than its factorization.

42139677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342643.

The product of its digits is 63504, while the sum is 39.

The square root of 42139677 is about 6491.5080682381. The cubic root of 42139677 is about 347.9875722210.

The spelling of 42139677 in words is "forty-two million, one hundred thirty-nine thousand, six hundred seventy-seven".