139140054 has 48 divisors (see below), whose sum is σ = 314954640. Its totient is φ = 44349120.

The previous prime is 139140037. The next prime is 139140061. The reversal of 139140054 is 450041931.

139140054 is digitally balanced in base 2, 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 23 ways as a sum of consecutive naturals, for example, 37524 + ... + 41064.

It is an arithmetic number, because the mean of its divisors is an integer number (6561555).

Almost surely, 2^139140054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139140054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157477320).

139140054 is an abundant number, since it is smaller than the sum of its proper divisors (175814586).

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

139140054 is a wasteful number, since it uses less digits than its factorization.

139140054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 139140054 is about 11795.7642397600. The cubic root of 139140054 is about 518.1840676978.

Adding to 139140054 its reverse (450041931), we get a palindrome (589181985).

The spelling of 139140054 in words is "one hundred thirty-nine million, one hundred forty thousand, fifty-four".