1244120401 has 4 divisors (see below), whose sum is σ = 1317303972. Its totient is φ = 1170936832.

The previous prime is 1244120389. The next prime is 1244120407. The reversal of 1244120401 is 1040214421.

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 1137308176 + 106812225 = 33724^2 + 10335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244120401 - 2⁵ = 1244120369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244120407) 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, 36591760 + ... + 36591793.

It is an arithmetic number, because the mean of its divisors is an integer number (329325993).

Almost surely, 2^1244120401 is an apocalyptic number.

It is an amenable number.

1244120401 is a deficient number, since it is larger than the sum of its proper divisors (73183571).

1244120401 is an equidigital number, since it uses as much as digits as its factorization.

1244120401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73183570.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1244120401 is about 35272.0909643871. The cubic root of 1244120401 is about 1075.5257283565.

Adding to 1244120401 its reverse (1040214421), we get a palindrome (2284334822).

The spelling of 1244120401 in words is "one billion, two hundred forty-four million, one hundred twenty thousand, four hundred one".