27139257 has 24 divisors (see below), whose sum is σ = 40569984. Its totient is φ = 17471904.

The previous prime is 27139249. The next prime is 27139267. The reversal of 27139257 is 75293172.

It is not a de Polignac number, because 27139257 - 2³ = 27139249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27139247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34723 + ... + 35495.

It is an arithmetic number, because the mean of its divisors is an integer number (1690416).

Almost surely, 2^27139257 is an apocalyptic number.

It is an amenable number.

27139257 is a deficient number, since it is larger than the sum of its proper divisors (13430727).

27139257 is a wasteful number, since it uses less digits than its factorization.

27139257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 906 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 27139257 is about 5209.5351999963. The cubic root of 27139257 is about 300.5148824812.

The spelling of 27139257 in words is "twenty-seven million, one hundred thirty-nine thousand, two hundred fifty-seven".