138015425 has 12 divisors (see below), whose sum is σ = 171813036. Its totient is φ = 109977600.

The previous prime is 138015419. The next prime is 138015431. The reversal of 138015425 is 524510831.

It is an interprime number because it is at equal distance from previous prime (138015419) and next prime (138015431).

It can be written as a sum of positive squares in 6 ways, for example, as 12418576 + 125596849 = 3524^2 + 11207^2 .

It is not a de Polignac number, because 138015425 - 2¹⁸ = 137753281 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 11 ways as a sum of consecutive naturals, for example, 4316 + ... + 17165.

It is an arithmetic number, because the mean of its divisors is an integer number (14317753).

Almost surely, 2^138015425 is an apocalyptic number.

It is an amenable number.

138015425 is a deficient number, since it is larger than the sum of its proper divisors (33797611).

138015425 is a wasteful number, since it uses less digits than its factorization.

138015425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21748 (or 21743 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 138015425 is about 11747.9966377251. The cubic root of 138015425 is about 516.7841783813.

The spelling of 138015425 in words is "one hundred thirty-eight million, fifteen thousand, four hundred twenty-five".