138475250 has 16 divisors (see below), whose sum is σ = 259226136. Its totient is φ = 55390000.

The previous prime is 138475241. The next prime is 138475277. The reversal of 138475250 is 52574831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47100769 + 91374481 = 6863^2 + 9559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138475250.

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, 276701 + ... + 277200.

Almost surely, 2^138475250 is an apocalyptic number.

138475250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138475250 is a deficient number, since it is larger than the sum of its proper divisors (120750886).

138475250 is an equidigital number, since it uses as much as digits as its factorization.

138475250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553918 (or 553908 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 138475250 is about 11767.5507222191. The cubic root of 138475250 is about 517.3574642260.

The spelling of 138475250 in words is "one hundred thirty-eight million, four hundred seventy-five thousand, two hundred fifty".