139955085 has 24 divisors (see below), whose sum is σ = 242914464. Its totient is φ = 74542560.

The previous prime is 139955071. The next prime is 139955093. The reversal of 139955085 is 580559931.

139955085 is a `hidden beast` number, since 1 + 3 + 99 + 550 + 8 + 5 = 666.

139955085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139955085 - 2¹² = 139950989 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139955085.

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, 42094 + ... + 45296.

It is an arithmetic number, because the mean of its divisors is an integer number (10121436).

Almost surely, 2^139955085 is an apocalyptic number.

139955085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139955085 is a deficient number, since it is larger than the sum of its proper divisors (102959379).

139955085 is a wasteful number, since it uses less digits than its factorization.

139955085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The square root of 139955085 is about 11830.2614087771. The cubic root of 139955085 is about 519.1938754666.

139955085 divided by its sum of digits (45) gives a palindrome (3110113).

The spelling of 139955085 in words is "one hundred thirty-nine million, nine hundred fifty-five thousand, eighty-five".