139429155 has 16 divisors (see below), whose sum is σ = 236209824. Its totient is φ = 69987840.

The previous prime is 139429153. The next prime is 139429181. The reversal of 139429155 is 551924931.

It is not a de Polignac number, because 139429155 - 2¹ = 139429153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139429153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273136 + ... + 273645.

It is an arithmetic number, because the mean of its divisors is an integer number (14763114).

Almost surely, 2^139429155 is an apocalyptic number.

139429155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139429155 is a deficient number, since it is larger than the sum of its proper divisors (96780669).

139429155 is a wasteful number, since it uses less digits than its factorization.

139429155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546806.

The product of its digits is 48600, while the sum is 39.

The square root of 139429155 is about 11808.0123221480. The cubic root of 139429155 is about 518.5427084876.

The spelling of 139429155 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, one hundred fifty-five".