1244121153 has 12 divisors (see below), whose sum is σ = 1823340624. Its totient is φ = 754012600.

The previous prime is 1244121119. The next prime is 1244121167. The reversal of 1244121153 is 3511214421.

It is not a de Polignac number, because 1244121153 - 2⁹ = 1244120641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244122153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1713303 + ... + 1714028.

It is an arithmetic number, because the mean of its divisors is an integer number (151945052).

Almost surely, 2^1244121153 is an apocalyptic number.

It is an amenable number.

1244121153 is a deficient number, since it is larger than the sum of its proper divisors (579219471).

1244121153 is a wasteful number, since it uses less digits than its factorization.

1244121153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427356 (or 3427345 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 1244121153 is about 35272.1016243716. The cubic root of 1244121153 is about 1075.5259450545.

Adding to 1244121153 its reverse (3511214421), we get a palindrome (4755335574).

The spelling of 1244121153 in words is "one billion, two hundred forty-four million, one hundred twenty-one thousand, one hundred fifty-three".