139330281 has 16 divisors (see below), whose sum is σ = 187616000. Its totient is φ = 91970640.

The previous prime is 139330229. The next prime is 139330309. The reversal of 139330281 is 182033931.

It is not a de Polignac number, because 139330281 - 2¹⁴ = 139313897 is a prime.

It is a super-2 number, since 2×139330281² = 38825854407077922, 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 (139330201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243726 + ... + 244296.

It is an arithmetic number, because the mean of its divisors is an integer number (11726000).

Almost surely, 2^139330281 is an apocalyptic number.

It is an amenable number.

139330281 is a deficient number, since it is larger than the sum of its proper divisors (48285719).

139330281 is a wasteful number, since it uses less digits than its factorization.

139330281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 139330281 is about 11803.8248462098. The cubic root of 139330281 is about 518.4201073579.

The spelling of 139330281 in words is "one hundred thirty-nine million, three hundred thirty thousand, two hundred eighty-one".