1143997 has 4 divisors (see below), whose sum is σ = 1193760. Its totient is φ = 1094236.

The previous prime is 1143977. The next prime is 1144001. The reversal of 1143997 is 7993411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7993411 = 1297 ⋅6163.

It is a cyclic number.

It is not a de Polignac number, because 1143997 - 2¹¹ = 1141949 is a prime.

It is a Duffinian number.

1143997 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24847 + ... + 24892.

It is an arithmetic number, because the mean of its divisors is an integer number (298440).

2^1143997 is an apocalyptic number.

It is an amenable number.

1143997 is a deficient number, since it is larger than the sum of its proper divisors (49763).

1143997 is an equidigital number, since it uses as much as digits as its factorization.

1143997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49762.

The product of its digits is 6804, while the sum is 34.

The square root of 1143997 is about 1069.5779541483. The cubic root of 1143997 is about 104.5863392133.

The spelling of 1143997 in words is "one million, one hundred forty-three thousand, nine hundred ninety-seven".