1145310521 has 4 divisors (see below), whose sum is σ = 1145379444. Its totient is φ = 1145241600.

The previous prime is 1145310487. The next prime is 1145310533. The reversal of 1145310521 is 1250135411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 684607225 + 460703296 = 26165^2 + 21464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145310521 - 2¹⁰ = 1145309497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145310541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7481 + ... + 48441.

It is an arithmetic number, because the mean of its divisors is an integer number (286344861).

Almost surely, 2^1145310521 is an apocalyptic number.

It is an amenable number.

1145310521 is a deficient number, since it is larger than the sum of its proper divisors (68923).

1145310521 is an equidigital number, since it uses as much as digits as its factorization.

1145310521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68922.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1145310521 is about 33842.4366882765. The cubic root of 1145310521 is about 1046.2635208299.

Adding to 1145310521 its reverse (1250135411), we get a palindrome (2395445932).

The spelling of 1145310521 in words is "one billion, one hundred forty-five million, three hundred ten thousand, five hundred twenty-one".