1244984138 has 4 divisors (see below), whose sum is σ = 1867476210. Its totient is φ = 622492068.

The previous prime is 1244984129. The next prime is 1244984159. The reversal of 1244984138 is 8314894421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8314894421 = 5953 ⋅1396757.

It can be written as a sum of positive squares in only one way, i.e., 1030859449 + 214124689 = 32107^2 + 14633^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311246033 + ... + 311246036.

Almost surely, 2^1244984138 is an apocalyptic number.

1244984138 is a deficient number, since it is larger than the sum of its proper divisors (622492072).

1244984138 is an equidigital number, since it uses as much as digits as its factorization.

1244984138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622492071.

The product of its digits is 221184, while the sum is 44.

The square root of 1244984138 is about 35284.3327554880. The cubic root of 1244984138 is about 1075.7745672061.

The spelling of 1244984138 in words is "one billion, two hundred forty-four million, nine hundred eighty-four thousand, one hundred thirty-eight".