139131266 has 4 divisors (see below), whose sum is σ = 208696902. Its totient is φ = 69565632.

The previous prime is 139131259. The next prime is 139131269. The reversal of 139131266 is 662131931.

139131266 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 9740641 = 11375^2 + 3121^2 .

It is not an unprimeable number, because it can be changed into a prime (139131269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34782815 + ... + 34782818.

Almost surely, 2^139131266 is an apocalyptic number.

139131266 is a deficient number, since it is larger than the sum of its proper divisors (69565636).

139131266 is an equidigital number, since it uses as much as digits as its factorization.

139131266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69565635.

The product of its digits is 5832, while the sum is 32.

The square root of 139131266 is about 11795.3917272806. The cubic root of 139131266 is about 518.1731580727.

The spelling of 139131266 in words is "one hundred thirty-nine million, one hundred thirty-one thousand, two hundred sixty-six".