1144202421 has 4 divisors (see below), whose sum is σ = 1525603232. Its totient is φ = 762801612.

The previous prime is 1144202419. The next prime is 1144202429. The reversal of 1144202421 is 1242024411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1144202421 - 2¹ = 1144202419 is a prime.

It is a super-2 number, since 2×1144202421² = 2618398360444522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144202429) 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, 190700401 + ... + 190700406.

It is an arithmetic number, because the mean of its divisors is an integer number (381400808).

Almost surely, 2^1144202421 is an apocalyptic number.

It is an amenable number.

1144202421 is a deficient number, since it is larger than the sum of its proper divisors (381400811).

1144202421 is an equidigital number, since it uses as much as digits as its factorization.

1144202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381400810.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1144202421 is about 33826.0612693822. The cubic root of 1144202421 is about 1045.9259882899.

Adding to 1144202421 its reverse (1242024411), we get a palindrome (2386226832).

The spelling of 1144202421 in words is "one billion, one hundred forty-four million, two hundred two thousand, four hundred twenty-one".