1244140201 has 4 divisors (see below), whose sum is σ = 1264536004. Its totient is φ = 1223744400.

The previous prime is 1244140187. The next prime is 1244140213. The reversal of 1244140201 is 1020414421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1020414421 = 13 ⋅78493417.

It can be written as a sum of positive squares in 2 ways, for example, as 264387600 + 979752601 = 16260^2 + 31301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244140201 - 2⁵ = 1244140169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244140231) 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, 10197810 + ... + 10197931.

It is an arithmetic number, because the mean of its divisors is an integer number (316134001).

Almost surely, 2^1244140201 is an apocalyptic number.

It is an amenable number.

1244140201 is a deficient number, since it is larger than the sum of its proper divisors (20395803).

1244140201 is an equidigital number, since it uses as much as digits as its factorization.

1244140201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20395802.

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

The square root of 1244140201 is about 35272.3716384368. The cubic root of 1244140201 is about 1075.5314339395.

Adding to 1244140201 its reverse (1020414421), we get a palindrome (2264554622).

The spelling of 1244140201 in words is "one billion, two hundred forty-four million, one hundred forty thousand, two hundred one".