138670265 has 16 divisors (see below), whose sum is σ = 179901120. Its totient is φ = 102254400.

The previous prime is 138670253. The next prime is 138670267. The reversal of 138670265 is 562076831.

It is not a de Polignac number, because 138670265 - 2¹⁰ = 138669241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138670267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16211 + ... + 23240.

It is an arithmetic number, because the mean of its divisors is an integer number (11243820).

Almost surely, 2^138670265 is an apocalyptic number.

It is an amenable number.

138670265 is a deficient number, since it is larger than the sum of its proper divisors (41230855).

138670265 is a wasteful number, since it uses less digits than its factorization.

138670265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39512.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 138670265 is about 11775.8339407449. The cubic root of 138670265 is about 517.6002155252.

The spelling of 138670265 in words is "one hundred thirty-eight million, six hundred seventy thousand, two hundred sixty-five".