139241081 has 8 divisors (see below), whose sum is σ = 159276864. Its totient is φ = 119241360.

The previous prime is 139241059. The next prime is 139241083. The reversal of 139241081 is 180142931.

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

It is not a de Polignac number, because 139241081 - 2¹⁸ = 138978937 is a prime.

It is a super-2 number, since 2×139241081² = 38776157276097122, 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 (139241083) 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 7 ways as a sum of consecutive naturals, for example, 155 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (19909608).

Almost surely, 2^139241081 is an apocalyptic number.

It is an amenable number.

139241081 is a deficient number, since it is larger than the sum of its proper divisors (20035783).

139241081 is a wasteful number, since it uses less digits than its factorization.

139241081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18031.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 139241081 is about 11800.0458049958. The cubic root of 139241081 is about 518.3094519543.

The spelling of 139241081 in words is "one hundred thirty-nine million, two hundred forty-one thousand, eighty-one".