1111643 has 8 divisors (see below), whose sum is σ = 1205568. Its totient is φ = 1018944.

The previous prime is 1111639. The next prime is 1111651. The reversal of 1111643 is 3461111.

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 1111643 - 2² = 1111639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111673) 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, 2846 + ... + 3212.

It is an arithmetic number, because the mean of its divisors is an integer number (150696).

2^1111643 is an apocalyptic number.

1111643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1111643 is a deficient number, since it is larger than the sum of its proper divisors (93925).

1111643 is a wasteful number, since it uses less digits than its factorization.

1111643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 72, while the sum is 17.

The square root of 1111643 is about 1054.3448202557. The cubic root of 1111643 is about 103.5909412531.

Adding to 1111643 its reverse (3461111), we get a palindrome (4572754).

The spelling of 1111643 in words is "one million, one hundred eleven thousand, six hundred forty-three".