1143965 has 4 divisors (see below), whose sum is σ = 1372764. Its totient is φ = 915168.

The previous prime is 1143959. The next prime is 1143977. The reversal of 1143965 is 5693411.

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 337561 + 806404 = 581^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143965 - 2⁴ = 1143949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 114392 + ... + 114401.

It is an arithmetic number, because the mean of its divisors is an integer number (343191).

2^1143965 is an apocalyptic number.

It is an amenable number.

1143965 is a deficient number, since it is larger than the sum of its proper divisors (228799).

1143965 is an equidigital number, since it uses as much as digits as its factorization.

1143965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228798.

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

The square root of 1143965 is about 1069.5629948722. The cubic root of 1143965 is about 104.5853640377.

The spelling of 1143965 in words is "one million, one hundred forty-three thousand, nine hundred sixty-five".