139865140 has 12 divisors (see below), whose sum is σ = 293716836. Its totient is φ = 55946048.

The previous prime is 139865129. The next prime is 139865147. The reversal of 139865140 is 41568931.

139865140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 22316176 + 117548964 = 4724^2 + 10842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139865140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139865147) 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, 3496609 + ... + 3496648.

It is an arithmetic number, because the mean of its divisors is an integer number (24476403).

Almost surely, 2^139865140 is an apocalyptic number.

139865140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139865140 is an abundant number, since it is smaller than the sum of its proper divisors (153851696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139865140 is a wasteful number, since it uses less digits than its factorization.

139865140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993266 (or 6993264 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 139865140 is about 11826.4593179869. The cubic root of 139865140 is about 519.0826281077.

The spelling of 139865140 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, one hundred forty".