1244401421 has 4 divisors (see below), whose sum is σ = 1244587200. Its totient is φ = 1244215644.

The previous prime is 1244401387. The next prime is 1244401429. The reversal of 1244401421 is 1241044421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1244401421 - 2³⁰ = 170659597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244401429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82451 + ... + 96368.

It is an arithmetic number, because the mean of its divisors is an integer number (311146800).

Almost surely, 2^1244401421 is an apocalyptic number.

It is an amenable number.

1244401421 is a deficient number, since it is larger than the sum of its proper divisors (185779).

1244401421 is an equidigital number, since it uses as much as digits as its factorization.

1244401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185778.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1244401421 is about 35276.0743422507. The cubic root of 1244401421 is about 1075.6067016251.

Adding to 1244401421 its reverse (1241044421), we get a palindrome (2485445842).

The spelling of 1244401421 in words is "one billion, two hundred forty-four million, four hundred one thousand, four hundred twenty-one".