1144220403 has 8 divisors (see below), whose sum is σ = 1527231888. Its totient is φ = 762011264.

The previous prime is 1144220381. The next prime is 1144220419. The reversal of 1144220403 is 3040224411.

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 1144220403 - 2²⁸ = 875784947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144220403.

It is not an unprimeable number, because it can be changed into a prime (1144220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197250 + ... + 202967.

It is an arithmetic number, because the mean of its divisors is an integer number (190903986).

Almost surely, 2^1144220403 is an apocalyptic number.

1144220403 is a deficient number, since it is larger than the sum of its proper divisors (383011485).

1144220403 is an equidigital number, since it uses as much as digits as its factorization.

1144220403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401173.

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

The square root of 1144220403 is about 33826.3270693110. The cubic root of 1144220403 is about 1045.9314674319.

Adding to 1144220403 its reverse (3040224411), we get a palindrome (4184444814).

The spelling of 1144220403 in words is "one billion, one hundred forty-four million, two hundred twenty thousand, four hundred three".