138870425 has 12 divisors (see below), whose sum is σ = 173301036. Its totient is φ = 110385600.

The previous prime is 138870419. The next prime is 138870439. The reversal of 138870425 is 524078831.

It can be written as a sum of positive squares in 6 ways, for example, as 196249 + 138674176 = 443^2 + 11776^2 .

It is a de Polignac number, because none of the positive numbers 2^k-138870425 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13766 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (14441753).

Almost surely, 2^138870425 is an apocalyptic number.

It is an amenable number.

138870425 is a deficient number, since it is larger than the sum of its proper divisors (34430611).

138870425 is a wasteful number, since it uses less digits than its factorization.

138870425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35548 (or 35543 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 138870425 is about 11784.3296372768. The cubic root of 138870425 is about 517.8491346703.

The spelling of 138870425 in words is "one hundred thirty-eight million, eight hundred seventy thousand, four hundred twenty-five".