1244001413 has 4 divisors (see below), whose sum is σ = 1255414380. Its totient is φ = 1232588448.

The previous prime is 1244001389. The next prime is 1244001419. The reversal of 1244001413 is 3141004421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3141004421 = 67 ⋅46880663.

It can be written as a sum of positive squares in 2 ways, for example, as 665743204 + 578258209 = 25802^2 + 24047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244001413 - 2¹⁶ = 1243935877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244001419) 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, 5706320 + ... + 5706537.

It is an arithmetic number, because the mean of its divisors is an integer number (313853595).

Almost surely, 2^1244001413 is an apocalyptic number.

It is an amenable number.

1244001413 is a deficient number, since it is larger than the sum of its proper divisors (11412967).

1244001413 is a wasteful number, since it uses less digits than its factorization.

1244001413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11412966.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1244001413 is about 35270.4042080609. The cubic root of 1244001413 is about 1075.4914394095.

Adding to 1244001413 its reverse (3141004421), we get a palindrome (4385005834).

The spelling of 1244001413 in words is "one billion, two hundred forty-four million, one thousand, four hundred thirteen".