1143897 has 8 divisors (see below), whose sum is σ = 1530144. Its totient is φ = 760128.

The previous prime is 1143893. The next prime is 1143943. The reversal of 1143897 is 7983411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143897 - 2² = 1143893 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1143893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 2100.

It is an arithmetic number, because the mean of its divisors is an integer number (191268).

2^1143897 is an apocalyptic number.

It is an amenable number.

1143897 is a deficient number, since it is larger than the sum of its proper divisors (386247).

1143897 is an equidigital number, since it uses as much as digits as its factorization.

1143897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 6048, while the sum is 33.

The square root of 1143897 is about 1069.5312057159. The cubic root of 1143897 is about 104.5832917290.

The spelling of 1143897 in words is "one million, one hundred forty-three thousand, eight hundred ninety-seven".