1144505021 has 8 divisors (see below), whose sum is σ = 1249581600. Its totient is φ = 1039600240.

The previous prime is 1144505017. The next prime is 1144505029. The reversal of 1144505021 is 1205054411.

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 1144505021 - 2² = 1144505017 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 (1144505029) 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, 28811 + ... + 55848.

It is an arithmetic number, because the mean of its divisors is an integer number (156197700).

Almost surely, 2^1144505021 is an apocalyptic number.

1144505021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1144505021 is a deficient number, since it is larger than the sum of its proper divisors (105076579).

1144505021 is a wasteful number, since it uses less digits than its factorization.

1144505021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85899.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1144505021 is about 33830.5338562666. The cubic root of 1144505021 is about 1046.0181833134.

Adding to 1144505021 its reverse (1205054411), we get a palindrome (2349559432).

The spelling of 1144505021 in words is "one billion, one hundred forty-four million, five hundred five thousand, twenty-one".