1143345 has 16 divisors (see below), whose sum is σ = 2090880. Its totient is φ = 522624.

The previous prime is 1143341. The next prime is 1143347. The reversal of 1143345 is 5433411.

It is not a de Polignac number, because 1143345 - 2² = 1143341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1143345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1143341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5340 + ... + 5549.

It is an arithmetic number, because the mean of its divisors is an integer number (130680).

2^1143345 is an apocalyptic number.

1143345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143345 is a deficient number, since it is larger than the sum of its proper divisors (947535).

1143345 is a wasteful number, since it uses less digits than its factorization.

1143345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904.

The product of its digits is 720, while the sum is 21.

The square root of 1143345 is about 1069.2731175897. The cubic root of 1143345 is about 104.5664664188.

1143345 divided by its sum of digits (21) gives a palindrome (54445).

Adding to 1143345 its reverse (5433411), we get a palindrome (6576756).

The spelling of 1143345 in words is "one million, one hundred forty-three thousand, three hundred forty-five".