1143975 has 24 divisors (see below), whose sum is σ = 2162560. Its totient is φ = 522720.

The previous prime is 1143959. The next prime is 1143977. The reversal of 1143975 is 5793411.

It is not a de Polignac number, because 1143975 - 2⁴ = 1143959 is a prime.

1143975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143977) 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 23 ways as a sum of consecutive naturals, for example, 565 + ... + 1614.

2^1143975 is an apocalyptic number.

1143975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1143975 is a deficient number, since it is larger than the sum of its proper divisors (1018585).

1143975 is a wasteful number, since it uses less digits than its factorization.

1143975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2194 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 1143975 is about 1069.5676696685. The cubic root of 1143975 is about 104.5856687820.

The spelling of 1143975 in words is "one million, one hundred forty-three thousand, nine hundred seventy-five".