1244431121 has 4 divisors (see below), whose sum is σ = 1244965044. Its totient is φ = 1243897200.

The previous prime is 1244431099. The next prime is 1244431157. The reversal of 1244431121 is 1211344421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 903844096 + 340587025 = 30064^2 + 18455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244431121 - 2³⁰ = 170689297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244401121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263450 + ... + 268131.

It is an arithmetic number, because the mean of its divisors is an integer number (311241261).

Almost surely, 2^1244431121 is an apocalyptic number.

It is an amenable number.

1244431121 is a deficient number, since it is larger than the sum of its proper divisors (533923).

1244431121 is an equidigital number, since it uses as much as digits as its factorization.

1244431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533922.

The product of its digits is 768, while the sum is 23.

The square root of 1244431121 is about 35276.4953049477. The cubic root of 1244431121 is about 1075.6152586883.

Adding to 1244431121 its reverse (1211344421), we get a palindrome (2455775542).

The spelling of 1244431121 in words is "one billion, two hundred forty-four million, four hundred thirty-one thousand, one hundred twenty-one".