139851855 has 96 divisors (see below), whose sum is σ = 288916992. Its totient is φ = 61689600.

The previous prime is 139851839. The next prime is 139851863. The reversal of 139851855 is 558158931.

It is not a de Polignac number, because 139851855 - 2⁴ = 139851839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 139851855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 662700 + ... + 662910.

It is an arithmetic number, because the mean of its divisors is an integer number (3009552).

Almost surely, 2^139851855 is an apocalyptic number.

139851855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139851855 is an abundant number, since it is smaller than the sum of its proper divisors (149065137).

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

139851855 is a wasteful number, since it uses less digits than its factorization.

139851855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 346 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 139851855 is about 11825.8976403485. The cubic root of 139851855 is about 519.0661926779.

The spelling of 139851855 in words is "one hundred thirty-nine million, eight hundred fifty-one thousand, eight hundred fifty-five".