138262625 has 8 divisors (see below), whose sum is σ = 172551912. Its totient is φ = 110610000.

The previous prime is 138262609. The next prime is 138262651. The reversal of 138262625 is 526262831.

It can be written as a sum of positive squares in 4 ways, for example, as 21967969 + 116294656 = 4687^2 + 10784^2 .

It is not a de Polignac number, because 138262625 - 2⁴ = 138262609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 552926 + ... + 553175.

It is an arithmetic number, because the mean of its divisors is an integer number (21568989).

Almost surely, 2^138262625 is an apocalyptic number.

It is an amenable number.

138262625 is a deficient number, since it is larger than the sum of its proper divisors (34289287).

138262625 is an equidigital number, since it uses as much as digits as its factorization.

138262625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106116 (or 1106106 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 138262625 is about 11758.5128736588. The cubic root of 138262625 is about 517.0925324513.

The spelling of 138262625 in words is "one hundred thirty-eight million, two hundred sixty-two thousand, six hundred twenty-five".