1144817621 has 32 divisors (see below), whose sum is σ = 1318705920. Its totient is φ = 987033600.

The previous prime is 1144817603. The next prime is 1144817627. The reversal of 1144817621 is 1267184411.

It is a de Polignac number, because none of the positive numbers 2^k-1144817621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144817627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1813976 + ... + 1814606.

It is an arithmetic number, because the mean of its divisors is an integer number (41209560).

Almost surely, 2^1144817621 is an apocalyptic number.

It is an amenable number.

1144817621 is a deficient number, since it is larger than the sum of its proper divisors (173888299).

1144817621 is a wasteful number, since it uses less digits than its factorization.

1144817621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845.

The product of its digits is 10752, while the sum is 35.

The square root of 1144817621 is about 33835.1536275513. The cubic root of 1144817621 is about 1046.1134080358.

The spelling of 1144817621 in words is "one billion, one hundred forty-four million, eight hundred seventeen thousand, six hundred twenty-one".