1144664421 has 8 divisors (see below), whose sum is σ = 1526375520. Its totient is φ = 763031472.

The previous prime is 1144664419. The next prime is 1144664431. The reversal of 1144664421 is 1244664411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1144664421 - 2¹ = 1144664419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144664401) 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 7 ways as a sum of consecutive naturals, for example, 47731 + ... + 67583.

It is an arithmetic number, because the mean of its divisors is an integer number (190796940).

Almost surely, 2^1144664421 is an apocalyptic number.

It is an amenable number.

1144664421 is a deficient number, since it is larger than the sum of its proper divisors (381711099).

1144664421 is a wasteful number, since it uses less digits than its factorization.

1144664421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39075.

The product of its digits is 18432, while the sum is 33.

The square root of 1144664421 is about 33832.8896342006. The cubic root of 1144664421 is about 1046.0667421679.

The spelling of 1144664421 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, four hundred twenty-one".