138132285 has 16 divisors (see below), whose sum is σ = 226985856. Its totient is φ = 71679168.

The previous prime is 138132277. The next prime is 138132287. The reversal of 138132285 is 582231831.

It is not a de Polignac number, because 138132285 - 2³ = 138132277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138132287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123889 + ... + 124998.

It is an arithmetic number, because the mean of its divisors is an integer number (14186616).

Almost surely, 2^138132285 is an apocalyptic number.

138132285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138132285 is a deficient number, since it is larger than the sum of its proper divisors (88853571).

138132285 is a wasteful number, since it uses less digits than its factorization.

138132285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248932.

The product of its digits is 11520, while the sum is 33.

The square root of 138132285 is about 11752.9691993130. The cubic root of 138132285 is about 516.9299938757.

The spelling of 138132285 in words is "one hundred thirty-eight million, one hundred thirty-two thousand, two hundred eighty-five".