139449555 has 48 divisors (see below), whose sum is σ = 292503744. Its totient is φ = 59996160.

The previous prime is 139449539. The next prime is 139449577. The reversal of 139449555 is 555944931.

139449555 is a `hidden beast` number, since 1 + 3 + 94 + 4 + 9 + 555 = 666.

It is not a de Polignac number, because 139449555 - 2⁴ = 139449539 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 139449555.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7666 + ... + 18375.

It is an arithmetic number, because the mean of its divisors is an integer number (6093828).

Almost surely, 2^139449555 is an apocalyptic number.

139449555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139449555 is an abundant number, since it is smaller than the sum of its proper divisors (153054189).

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

139449555 is a wasteful number, since it uses less digits than its factorization.

139449555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26076 (or 26073 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 139449555 is about 11808.8761107906. The cubic root of 139449555 is about 518.5679967313.

The spelling of 139449555 in words is "one hundred thirty-nine million, four hundred forty-nine thousand, five hundred fifty-five".