139038251 has 8 divisors (see below), whose sum is σ = 153021744. Its totient is φ = 125278720.

The previous prime is 139038191. The next prime is 139038269. The reversal of 139038251 is 152830931.

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 139038251 - 2²⁶ = 71929387 is a prime.

It is a super-2 number, since 2×139038251² = 38663270482278002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139038281) 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, 54686 + ... + 57171.

It is an arithmetic number, because the mean of its divisors is an integer number (19127718).

Almost surely, 2^139038251 is an apocalyptic number.

139038251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139038251 is a deficient number, since it is larger than the sum of its proper divisors (13983493).

139038251 is a wasteful number, since it uses less digits than its factorization.

139038251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111981.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 139038251 is about 11791.4482147020. The cubic root of 139038251 is about 518.0576589415.

The spelling of 139038251 in words is "one hundred thirty-nine million, thirty-eight thousand, two hundred fifty-one".