1143646 has 8 divisors (see below), whose sum is σ = 1960560. Its totient is φ = 490128.

The previous prime is 1143643. The next prime is 1143647. The reversal of 1143646 is 6463411.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1143646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143643) 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, 40831 + ... + 40858.

It is an arithmetic number, because the mean of its divisors is an integer number (245070).

2^1143646 is an apocalyptic number.

1143646 is a deficient number, since it is larger than the sum of its proper divisors (816914).

1143646 is an equidigital number, since it uses as much as digits as its factorization.

1143646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81698.

The product of its digits is 1728, while the sum is 25.

The square root of 1143646 is about 1069.4138581485. The cubic root of 1143646 is about 104.5756417610.

The spelling of 1143646 in words is "one million, one hundred forty-three thousand, six hundred forty-six".