139423241 has 8 divisors (see below), whose sum is σ = 141396360. Its totient is φ = 137461248.

The previous prime is 139423237. The next prime is 139423261. The reversal of 139423241 is 142324931.

It can be written as a sum of positive squares in 4 ways, for example, as 15768841 + 123654400 = 3971^2 + 11120^2 .

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 139423241 - 2² = 139423237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139423201) 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, 24275 + ... + 29463.

It is an arithmetic number, because the mean of its divisors is an integer number (17674545).

Almost surely, 2^139423241 is an apocalyptic number.

It is an amenable number.

139423241 is a deficient number, since it is larger than the sum of its proper divisors (1973119).

139423241 is an equidigital number, since it uses as much as digits as its factorization.

139423241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563.

The product of its digits is 5184, while the sum is 29.

The square root of 139423241 is about 11807.7618963121. The cubic root of 139423241 is about 518.5353769149.

The spelling of 139423241 in words is "one hundred thirty-nine million, four hundred twenty-three thousand, two hundred forty-one".