1145569 has 4 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 1142020.

The previous prime is 1145539. The next prime is 1145593. The reversal of 1145569 is 9655411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145569 - 2⁵ = 1145537 is a prime.

It is a super-2 number, since 2×1145569² = 2624656667522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1145569.

It is not an unprimeable number, because it can be changed into a prime (1145509) 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, 1237 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

2^1145569 is an apocalyptic number.

It is an amenable number.

1145569 is a deficient number, since it is larger than the sum of its proper divisors (3551).

1145569 is an equidigital number, since it uses as much as digits as its factorization.

1145569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550.

The product of its digits is 5400, while the sum is 31.

The square root of 1145569 is about 1070.3125711679. The cubic root of 1145569 is about 104.6342223447.

The spelling of 1145569 in words is "one million, one hundred forty-five thousand, five hundred sixty-nine".