1260000139 has 4 divisors (see below), whose sum is σ = 1260144424. Its totient is φ = 1259855856.

The previous prime is 1260000107. The next prime is 1260000163. The reversal of 1260000139 is 9310000621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310000621 = 61 ⋅152622961.

It is a cyclic number.

It is not a de Polignac number, because 1260000139 - 2⁵ = 1260000107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260000199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58137 + ... + 76810.

It is an arithmetic number, because the mean of its divisors is an integer number (315036106).

Almost surely, 2^1260000139 is an apocalyptic number.

1260000139 is a deficient number, since it is larger than the sum of its proper divisors (144285).

1260000139 is an equidigital number, since it uses as much as digits as its factorization.

1260000139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144284.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1260000139 is about 35496.4806565383. The cubic root of 1260000139 is about 1080.0823379726.

The spelling of 1260000139 in words is "one billion, two hundred sixty million, one hundred thirty-nine", and thus it is an aban number.