139860855 has 12 divisors (see below), whose sum is σ = 242425560. Its totient is φ = 74592432.

The previous prime is 139860839. The next prime is 139860869. The reversal of 139860855 is 558068931.

139860855 is a `hidden beast` number, since 1 + 39 + 8 + 608 + 5 + 5 = 666.

It is not a de Polignac number, because 139860855 - 2⁴ = 139860839 is a prime.

It is a super-2 number, since 2×139860855² = 39122117522662050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3108019 = 139860855 / (1 + 3 + 9 + 8 + 6 + 0 + 8 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 139860855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1553965 + ... + 1554054.

It is an arithmetic number, because the mean of its divisors is an integer number (20202130).

Almost surely, 2^139860855 is an apocalyptic number.

139860855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139860855 is a deficient number, since it is larger than the sum of its proper divisors (102564705).

139860855 is a wasteful number, since it uses less digits than its factorization.

139860855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108030 (or 3108027 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 139860855 is about 11826.2781550241. The cubic root of 139860855 is about 519.0773270685.

It can be divided in two parts, 139860 and 855, that added together give a triangular number (140715 = T₅₃₀).

The spelling of 139860855 in words is "one hundred thirty-nine million, eight hundred sixty thousand, eight hundred fifty-five".