1145125565 has 4 divisors (see below), whose sum is σ = 1374150684. Its totient is φ = 916100448.

The previous prime is 1145125537. The next prime is 1145125571. The reversal of 1145125565 is 5655215411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 908057956 + 237067609 = 30134^2 + 15397^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145125565 - 2⁸ = 1145125309 is a prime.

It is a super-2 number, since 2×1145125565² = 2622625119233138450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114512552 + ... + 114512561.

It is an arithmetic number, because the mean of its divisors is an integer number (343537671).

Almost surely, 2^1145125565 is an apocalyptic number.

It is an amenable number.

1145125565 is a deficient number, since it is larger than the sum of its proper divisors (229025119).

1145125565 is an equidigital number, since it uses as much as digits as its factorization.

1145125565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229025118.

The product of its digits is 30000, while the sum is 35.

The square root of 1145125565 is about 33839.7039732915. The cubic root of 1145125565 is about 1046.2071974922.

The spelling of 1145125565 in words is "one billion, one hundred forty-five million, one hundred twenty-five thousand, five hundred sixty-five".