138527825 has 12 divisors (see below), whose sum is σ = 172531740. Its totient is φ = 110333760.

The previous prime is 138527821. The next prime is 138527861. The reversal of 138527825 is 528725831.

It can be written as a sum of positive squares in 6 ways, for example, as 65536 + 138462289 = 256^2 + 11767^2 .

It is not a de Polignac number, because 138527825 - 2² = 138527821 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138527821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6374 + ... + 17823.

It is an arithmetic number, because the mean of its divisors is an integer number (14377645).

Almost surely, 2^138527825 is an apocalyptic number.

It is an amenable number.

138527825 is a deficient number, since it is larger than the sum of its proper divisors (34003915).

138527825 is a wasteful number, since it uses less digits than its factorization.

138527825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436 (or 24431 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 138527825 is about 11769.7844075412. The cubic root of 138527825 is about 517.4229311044.

The spelling of 138527825 in words is "one hundred thirty-eight million, five hundred twenty-seven thousand, eight hundred twenty-five".