1145253521 has 8 divisors (see below), whose sum is σ = 1169385984. Its totient is φ = 1121214640.

The previous prime is 1145253509. The next prime is 1145253581. The reversal of 1145253521 is 1253525411.

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 1145253521 - 2¹⁸ = 1144991377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145253581) 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, 1616 + ... + 47886.

It is an arithmetic number, because the mean of its divisors is an integer number (146173248).

Almost surely, 2^1145253521 is an apocalyptic number.

It is an amenable number.

1145253521 is a deficient number, since it is larger than the sum of its proper divisors (24132463).

1145253521 is an equidigital number, since it uses as much as digits as its factorization.

1145253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46791.

The product of its digits is 6000, while the sum is 29.

The square root of 1145253521 is about 33841.5945398558. The cubic root of 1145253521 is about 1046.2461636710.

Adding to 1145253521 its reverse (1253525411), we get a palindrome (2398778932).

The spelling of 1145253521 in words is "one billion, one hundred forty-five million, two hundred fifty-three thousand, five hundred twenty-one".