1244226139 has 16 divisors (see below), whose sum is σ = 1381917600. Its totient is φ = 1112912640.

The previous prime is 1244226133. The next prime is 1244226167. The reversal of 1244226139 is 9316224421.

It is a cyclic number.

It is not a de Polignac number, because 1244226139 - 2⁹ = 1244225627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244226133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71584 + ... + 87250.

It is an arithmetic number, because the mean of its divisors is an integer number (86369850).

Almost surely, 2^1244226139 is an apocalyptic number.

1244226139 is a deficient number, since it is larger than the sum of its proper divisors (137691461).

1244226139 is a wasteful number, since it uses less digits than its factorization.

1244226139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870.

The product of its digits is 20736, while the sum is 34.

The square root of 1244226139 is about 35273.5898229823. The cubic root of 1244226139 is about 1075.5561971969.

The spelling of 1244226139 in words is "one billion, two hundred forty-four million, two hundred twenty-six thousand, one hundred thirty-nine".