139105240 has 16 divisors (see below), whose sum is σ = 312986880. Its totient is φ = 55642080.

The previous prime is 139105229. The next prime is 139105273. The reversal of 139105240 is 42501931.

139105240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738776 + ... + 1738855.

It is an arithmetic number, because the mean of its divisors is an integer number (19561680).

Almost surely, 2^139105240 is an apocalyptic number.

139105240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139105240 is an abundant number, since it is smaller than the sum of its proper divisors (173881640).

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

139105240 is a wasteful number, since it uses less digits than its factorization.

139105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477642 (or 3477638 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 139105240 is about 11794.2884482278. The cubic root of 139105240 is about 518.1408461034.

The spelling of 139105240 in words is "one hundred thirty-nine million, one hundred five thousand, two hundred forty".