139856271 has 8 divisors (see below), whose sum is σ = 186589104. Its totient is φ = 93180480.

The previous prime is 139856267. The next prime is 139856273. The reversal of 139856271 is 172658931.

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

It is not a de Polignac number, because 139856271 - 2² = 139856267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139856273) 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, 8166 + ... + 18611.

It is an arithmetic number, because the mean of its divisors is an integer number (23323638).

Almost surely, 2^139856271 is an apocalyptic number.

139856271 is a deficient number, since it is larger than the sum of its proper divisors (46732833).

139856271 is a wasteful number, since it uses less digits than its factorization.

139856271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28521.

The product of its digits is 90720, while the sum is 42.

The square root of 139856271 is about 11826.0843477459. The cubic root of 139856271 is about 519.0716560119.

The spelling of 139856271 in words is "one hundred thirty-nine million, eight hundred fifty-six thousand, two hundred seventy-one".