1143569 has 4 divisors (see below), whose sum is σ = 1306944. Its totient is φ = 980196.

The previous prime is 1143563. The next prime is 1143577. The reversal of 1143569 is 9653411.

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 not a de Polignac number, because 1143569 - 2¹² = 1139473 is a prime.

It is a super-2 number, since 2×1143569² = 2615500115522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81677 + ... + 81690.

It is an arithmetic number, because the mean of its divisors is an integer number (326736).

2^1143569 is an apocalyptic number.

It is an amenable number.

1143569 is a deficient number, since it is larger than the sum of its proper divisors (163375).

1143569 is an equidigital number, since it uses as much as digits as its factorization.

1143569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163374.

The product of its digits is 3240, while the sum is 29.

The square root of 1143569 is about 1069.3778565128. The cubic root of 1143569 is about 104.5732947337.

The spelling of 1143569 in words is "one million, one hundred forty-three thousand, five hundred sixty-nine".