139001266 has 4 divisors (see below), whose sum is σ = 208501902. Its totient is φ = 69500632.

The previous prime is 139001257. The next prime is 139001273. The reversal of 139001266 is 662100931.

139001266 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 662100931 = 23 ⋅28786997.

It can be written as a sum of positive squares in only one way, i.e., 91680625 + 47320641 = 9575^2 + 6879^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34750315 + ... + 34750318.

Almost surely, 2^139001266 is an apocalyptic number.

139001266 is a deficient number, since it is larger than the sum of its proper divisors (69500636).

139001266 is an equidigital number, since it uses as much as digits as its factorization.

139001266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69500635.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 139001266 is about 11789.8798127886. The cubic root of 139001266 is about 518.0117193972.

The spelling of 139001266 in words is "one hundred thirty-nine million, one thousand, two hundred sixty-six".