1144121401 has 4 divisors (see below), whose sum is σ = 1144783332. Its totient is φ = 1143459472.

The previous prime is 1144121393. The next prime is 1144121449. The reversal of 1144121401 is 1041214411.

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 600299001 + 543822400 = 24501^2 + 23320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144121401 - 2³ = 1144121393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144121491) 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, 328366 + ... + 331831.

It is an arithmetic number, because the mean of its divisors is an integer number (286195833).

Almost surely, 2^1144121401 is an apocalyptic number.

It is an amenable number.

1144121401 is a deficient number, since it is larger than the sum of its proper divisors (661931).

1144121401 is an equidigital number, since it uses as much as digits as its factorization.

1144121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661930.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1144121401 is about 33824.8636508708. The cubic root of 1144121401 is about 1045.9013006640.

Adding to 1144121401 its reverse (1041214411), we get a palindrome (2185335812).

The spelling of 1144121401 in words is "one billion, one hundred forty-four million, one hundred twenty-one thousand, four hundred one".