139382251 has 4 divisors (see below), whose sum is σ = 139521400. Its totient is φ = 139243104.

The previous prime is 139382203. The next prime is 139382261. The reversal of 139382251 is 152283931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139382251 - 2⁷ = 139382123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139382261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68061 + ... + 70078.

It is an arithmetic number, because the mean of its divisors is an integer number (34880350).

Almost surely, 2^139382251 is an apocalyptic number.

139382251 is a deficient number, since it is larger than the sum of its proper divisors (139149).

139382251 is a wasteful number, since it uses less digits than its factorization.

139382251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139148.

The product of its digits is 12960, while the sum is 34.

The square root of 139382251 is about 11806.0260460495. The cubic root of 139382251 is about 518.4845560039.

The spelling of 139382251 in words is "one hundred thirty-nine million, three hundred eighty-two thousand, two hundred fifty-one".