139276481 has 8 divisors (see below), whose sum is σ = 143503464. Its totient is φ = 135112320.

The previous prime is 139276453. The next prime is 139276507. The reversal of 139276481 is 184672931.

It can be written as a sum of positive squares in 4 ways, for example, as 3763600 + 135512881 = 1940^2 + 11641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139276481 - 2¹⁰ = 139275457 is a prime.

It is a super-2 number, since 2×139276481² = 38795876319486722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139273481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11186 + ... + 20091.

It is an arithmetic number, because the mean of its divisors is an integer number (17937933).

Almost surely, 2^139276481 is an apocalyptic number.

It is an amenable number.

139276481 is a deficient number, since it is larger than the sum of its proper divisors (4226983).

139276481 is an equidigital number, since it uses as much as digits as its factorization.

139276481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31411.

The product of its digits is 72576, while the sum is 41.

The square root of 139276481 is about 11801.5457038474. The cubic root of 139276481 is about 518.3533724213.

The spelling of 139276481 in words is "one hundred thirty-nine million, two hundred seventy-six thousand, four hundred eighty-one".