139268 has 12 divisors (see below), whose sum is σ = 250572. Its totient is φ = 67680.

The previous prime is 139267. The next prime is 139273. The reversal of 139268 is 862931.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 31684 = 328^2 + 178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139268.

It is not an unprimeable number, because it can be changed into a prime (139267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (20881).

2¹³⁹²⁶⁸ is an apocalyptic number.

It is an amenable number.

139268 is a deficient number, since it is larger than the sum of its proper divisors (111304).

139268 is a wasteful number, since it uses less digits than its factorization.

139268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 980 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 139268 is about 373.1862805624. The cubic root of 139268 is about 51.8342850798.

The spelling of 139268 in words is "one hundred thirty-nine thousand, two hundred sixty-eight".