139249 has 4 divisors (see below), whose sum is σ = 151920. Its totient is φ = 126580.

The previous prime is 139241. The next prime is 139267. The reversal of 139249 is 942931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139249 - 2³ = 139241 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (139241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6319 + ... + 6340.

It is an arithmetic number, because the mean of its divisors is an integer number (37980).

2¹³⁹²⁴⁹ is an apocalyptic number.

It is an amenable number.

139249 is a deficient number, since it is larger than the sum of its proper divisors (12671).

139249 is a wasteful number, since it uses less digits than its factorization.

139249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12670.

The product of its digits is 1944, while the sum is 28.

The square root of 139249 is about 373.1608232385. The cubic root of 139249 is about 51.8319277634.

It can be divided in two parts, 13924 and 9, that multiplied together give a square (125316 = 354²).

The spelling of 139249 in words is "one hundred thirty-nine thousand, two hundred forty-nine".