145169139 has 16 divisors (see below), whose sum is σ = 204019200. Its totient is φ = 91562976.

The previous prime is 145169117. The next prime is 145169159. The reversal of 145169139 is 931961541.

It is not a de Polignac number, because 145169139 - 2²³ = 136780531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145169097 and 145169106.

It is not an unprimeable number, because it can be changed into a prime (145169159) 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, 61717 + ... + 64025.

It is an arithmetic number, because the mean of its divisors is an integer number (12751200).

Almost surely, 2^145169139 is an apocalyptic number.

145169139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145169139 is a deficient number, since it is larger than the sum of its proper divisors (58850061).

145169139 is a wasteful number, since it uses less digits than its factorization.

145169139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434.

The product of its digits is 29160, while the sum is 39.

The square root of 145169139 is about 12048.6156466210. The cubic root of 145169139 is about 525.5629806557.

The spelling of 145169139 in words is "one hundred forty-five million, one hundred sixty-nine thousand, one hundred thirty-nine".