1140643 has 8 divisors (see below), whose sum is σ = 1331712. Its totient is φ = 956616.

The previous prime is 1140637. The next prime is 1140677. The reversal of 1140643 is 3460411.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1140643 - 2⁵ = 1140611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140643.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140143) 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 7 ways as a sum of consecutive naturals, for example, 1405 + ... + 2062.

It is an arithmetic number, because the mean of its divisors is an integer number (166464).

2^1140643 is an apocalyptic number.

1140643 is a deficient number, since it is larger than the sum of its proper divisors (191069).

1140643 is an equidigital number, since it uses as much as digits as its factorization.

1140643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1140643 is about 1068.0088950940. The cubic root of 1140643 is about 104.4840295184.

Subtracting from 1140643 its sum of digits (19), we obtain a square (1140624 = 1068²).

It can be divided in two parts, 11406 and 43, that added together give a square (11449 = 107²).

The spelling of 1140643 in words is "one million, one hundred forty thousand, six hundred forty-three".