127842639 has 8 divisors (see below), whose sum is σ = 171039792. Its totient is φ = 84936960.

The previous prime is 127842629. The next prime is 127842647. The reversal of 127842639 is 936248721.

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

It is not a de Polignac number, because 127842639 - 2⁴ = 127842623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127842639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127842629) 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, 71842 + ... + 73599.

It is an arithmetic number, because the mean of its divisors is an integer number (21379974).

Almost surely, 2^127842639 is an apocalyptic number.

127842639 is a deficient number, since it is larger than the sum of its proper divisors (43197153).

127842639 is a wasteful number, since it uses less digits than its factorization.

127842639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145737.

The product of its digits is 145152, while the sum is 42.

The square root of 127842639 is about 11306.7519208657. The cubic root of 127842639 is about 503.7618118968.

The spelling of 127842639 in words is "one hundred twenty-seven million, eight hundred forty-two thousand, six hundred thirty-nine".