139251 has 16 divisors (see below), whose sum is σ = 224000. Its totient is φ = 75168.

The previous prime is 139241. The next prime is 139267. The reversal of 139251 is 152931.

It is not a de Polignac number, because 139251 - 2⁶ = 139187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a d-powerful number, because it can be written as 1 + 3³ + 2¹¹ + 9⁵ + 5⁷ + 1 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139251.

It is not an unprimeable number, because it can be changed into a prime (139201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225 + ... + 573.

It is an arithmetic number, because the mean of its divisors is an integer number (14000).

2¹³⁹²⁵¹ is an apocalyptic number.

139251 is a deficient number, since it is larger than the sum of its proper divisors (84749).

139251 is a wasteful number, since it uses less digits than its factorization.

139251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its digits is 270, while the sum is 21.

The square root of 139251 is about 373.1635030385. The cubic root of 139251 is about 51.8321759120.

The spelling of 139251 in words is "one hundred thirty-nine thousand, two hundred fifty-one".