138721276 has 6 divisors (see below), whose sum is σ = 242762240. Its totient is φ = 69360636.

The previous prime is 138721267. The next prime is 138721301. The reversal of 138721276 is 672127831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17340156 + ... + 17340163.

Almost surely, 2^138721276 is an apocalyptic number.

It is an amenable number.

138721276 is a deficient number, since it is larger than the sum of its proper divisors (104040964).

138721276 is a wasteful number, since it uses less digits than its factorization.

138721276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34680323 (or 34680321 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 138721276 is about 11777.9996603838. Note that the first 3 decimals coincide. The cubic root of 138721276 is about 517.6636755797.

The spelling of 138721276 in words is "one hundred thirty-eight million, seven hundred twenty-one thousand, two hundred seventy-six".