1244340121 has 4 divisors (see below), whose sum is σ = 1244427472. Its totient is φ = 1244252772.

The previous prime is 1244340073. The next prime is 1244340133. The reversal of 1244340121 is 1210434421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1244340121 - 2¹⁵ = 1244307353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244340092 and 1244340101.

It is not an unprimeable number, because it can be changed into a prime (1244340151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16791 + ... + 52636.

It is an arithmetic number, because the mean of its divisors is an integer number (311106868).

Almost surely, 2^1244340121 is an apocalyptic number.

It is an amenable number.

1244340121 is a deficient number, since it is larger than the sum of its proper divisors (87351).

1244340121 is an equidigital number, since it uses as much as digits as its factorization.

1244340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87350.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1244340121 is about 35275.2054706985. The cubic root of 1244340121 is about 1075.5890396466.

Adding to 1244340121 its reverse (1210434421), we get a palindrome (2454774542).

The spelling of 1244340121 in words is "one billion, two hundred forty-four million, three hundred forty thousand, one hundred twenty-one".