1244155133 has 16 divisors (see below), whose sum is σ = 1364536320. Its totient is φ = 1127447424.

The previous prime is 1244155117. The next prime is 1244155139. The reversal of 1244155133 is 3315514421.

It is a cyclic number.

It is not a de Polignac number, because 1244155133 - 2⁴ = 1244155117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244155096 and 1244155105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244155139) 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, 208688 + ... + 214566.

It is an arithmetic number, because the mean of its divisors is an integer number (85283520).

Almost surely, 2^1244155133 is an apocalyptic number.

1244155133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1244155133 is a deficient number, since it is larger than the sum of its proper divisors (120381187).

1244155133 is a wasteful number, since it uses less digits than its factorization.

1244155133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6188.

The product of its digits is 7200, while the sum is 29.

The square root of 1244155133 is about 35272.5833048843. The cubic root of 1244155133 is about 1075.5357367158.

Adding to 1244155133 its reverse (3315514421), we get a palindrome (4559669554).

The spelling of 1244155133 in words is "one billion, two hundred forty-four million, one hundred fifty-five thousand, one hundred thirty-three".