1144765521 has 8 divisors (see below), whose sum is σ = 1695948960. Its totient is φ = 763176996.

The previous prime is 1144765507. The next prime is 1144765529. The reversal of 1144765521 is 1255674411.

1144765521 is a `hidden beast` number, since 114 + 476 + 55 + 21 = 666.

It is not a de Polignac number, because 1144765521 - 2⁹ = 1144765009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144765529) 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, 21199335 + ... + 21199388.

It is an arithmetic number, because the mean of its divisors is an integer number (211993620).

Almost surely, 2^1144765521 is an apocalyptic number.

It is an amenable number.

1144765521 is a deficient number, since it is larger than the sum of its proper divisors (551183439).

1144765521 is an equidigital number, since it uses as much as digits as its factorization.

1144765521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42398732 (or 42398726 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 1144765521 is about 33834.3837094752. The cubic root of 1144765521 is about 1046.0975384526.

The spelling of 1144765521 in words is "one billion, one hundred forty-four million, seven hundred sixty-five thousand, five hundred twenty-one".