138140225 has 12 divisors (see below), whose sum is σ = 172993020. Its totient is φ = 109416000.

The previous prime is 138140213. The next prime is 138140237. The reversal of 138140225 is 522041831.

It is an interprime number because it is at equal distance from previous prime (138140213) and next prime (138140237).

It can be written as a sum of positive squares in 6 ways, for example, as 1062961 + 137077264 = 1031^2 + 11708^2 .

It is not a de Polignac number, because 138140225 - 2¹² = 138136129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138140194 and 138140203.

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 11 ways as a sum of consecutive naturals, for example, 24830 + ... + 29879.

It is an arithmetic number, because the mean of its divisors is an integer number (14416085).

Almost surely, 2^138140225 is an apocalyptic number.

It is an amenable number.

138140225 is a deficient number, since it is larger than the sum of its proper divisors (34852795).

138140225 is a wasteful number, since it uses less digits than its factorization.

138140225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54820 (or 54815 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 138140225 is about 11753.3069814414. The cubic root of 138140225 is about 516.9398982595.

The spelling of 138140225 in words is "one hundred thirty-eight million, one hundred forty thousand, two hundred twenty-five".