138755265 has 16 divisors (see below), whose sum is σ = 242191296. Its totient is φ = 67275200.

The previous prime is 138755263. The next prime is 138755269. The reversal of 138755265 is 562557831.

It is not a de Polignac number, because 138755265 - 2¹ = 138755263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138755263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420306 + ... + 420635.

It is an arithmetic number, because the mean of its divisors is an integer number (15136956).

Almost surely, 2^138755265 is an apocalyptic number.

138755265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138755265 is a deficient number, since it is larger than the sum of its proper divisors (103436031).

138755265 is a wasteful number, since it uses less digits than its factorization.

138755265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840960.

The product of its digits is 252000, while the sum is 42.

The square root of 138755265 is about 11779.4424740732. The cubic root of 138755265 is about 517.7059508392.

The spelling of 138755265 in words is "one hundred thirty-eight million, seven hundred fifty-five thousand, two hundred sixty-five".