1173643 has 4 divisors (see below), whose sum is σ = 1186920. Its totient is φ = 1160368.

The previous prime is 1173631. The next prime is 1173709. The reversal of 1173643 is 3463711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3463711 = 919 ⋅3769.

It is a cyclic number.

It is not a de Polignac number, because 1173643 - 2¹⁷ = 1042571 is a prime.

It is an Ulam number.

It is a Duffinian number.

1173643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1173043) 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, 6505 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (296730).

2^1173643 is an apocalyptic number.

1173643 is a deficient number, since it is larger than the sum of its proper divisors (13277).

1173643 is an equidigital number, since it uses as much as digits as its factorization.

1173643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13276.

The product of its digits is 1512, while the sum is 25.

The square root of 1173643 is about 1083.3480511821. The cubic root of 1173643 is about 105.4820765730.

The spelling of 1173643 in words is "one million, one hundred seventy-three thousand, six hundred forty-three".