1244320401 has 8 divisors (see below), whose sum is σ = 1731228480. Its totient is φ = 793479632.

The previous prime is 1244320387. The next prime is 1244320409. The reversal of 1244320401 is 1040234421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244320401 - 2¹¹ = 1244318353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244320409) 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 7 ways as a sum of consecutive naturals, for example, 9016746 + ... + 9016883.

It is an arithmetic number, because the mean of its divisors is an integer number (216403560).

Almost surely, 2^1244320401 is an apocalyptic number.

It is an amenable number.

1244320401 is a deficient number, since it is larger than the sum of its proper divisors (486908079).

1244320401 is a wasteful number, since it uses less digits than its factorization.

1244320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18033655.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1244320401 is about 35274.9259531469. The cubic root of 1244320401 is about 1075.5833577253.

Adding to 1244320401 its reverse (1040234421), we get a palindrome (2284554822).

The spelling of 1244320401 in words is "one billion, two hundred forty-four million, three hundred twenty thousand, four hundred one".