138076281 has 12 divisors (see below), whose sum is σ = 227935552. Its totient is φ = 78900696.

The previous prime is 138076277. The next prime is 138076283. The reversal of 138076281 is 182670831.

It is not a de Polignac number, because 138076281 - 2² = 138076277 is a prime.

It is a super-2 number, since 2×138076281² = 38130118749581922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138076283) by changing a digit.

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, 1095781 + ... + 1095906.

Almost surely, 2^138076281 is an apocalyptic number.

It is an amenable number.

138076281 is a deficient number, since it is larger than the sum of its proper divisors (89859271).

138076281 is a wasteful number, since it uses less digits than its factorization.

138076281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191700 (or 2191697 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 138076281 is about 11750.5864108988. The cubic root of 138076281 is about 516.8601235077.

The spelling of 138076281 in words is "one hundred thirty-eight million, seventy-six thousand, two hundred eighty-one".