1145504531 has 4 divisors (see below), whose sum is σ = 1148150472. Its totient is φ = 1142858592.

The previous prime is 1145504501. The next prime is 1145504533. The reversal of 1145504531 is 1354055411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145504531 - 2¹⁴ = 1145488147 is a prime.

It is a super-2 number, since 2×1145504531² = 2624361261083059922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145504494 and 1145504503.

It is not an unprimeable number, because it can be changed into a prime (1145504533) 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, 1322321 + ... + 1323186.

It is an arithmetic number, because the mean of its divisors is an integer number (287037618).

Almost surely, 2^1145504531 is an apocalyptic number.

1145504531 is a deficient number, since it is larger than the sum of its proper divisors (2645941).

1145504531 is an equidigital number, since it uses as much as digits as its factorization.

1145504531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645940.

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

The square root of 1145504531 is about 33845.3029385172. The cubic root of 1145504531 is about 1046.3225948019.

Adding to 1145504531 its reverse (1354055411), we get a palindrome (2499559942).

The spelling of 1145504531 in words is "one billion, one hundred forty-five million, five hundred four thousand, five hundred thirty-one".