1159643 has 4 divisors (see below), whose sum is σ = 1176048. Its totient is φ = 1143240.

The previous prime is 1159633. The next prime is 1159649. The reversal of 1159643 is 3469511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3469511 = 691 ⋅5021.

It is a cyclic number.

It is not a de Polignac number, because 1159643 - 2¹⁸ = 897499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159649) 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, 8096 + ... + 8237.

It is an arithmetic number, because the mean of its divisors is an integer number (294012).

2^1159643 is an apocalyptic number.

1159643 is a deficient number, since it is larger than the sum of its proper divisors (16405).

1159643 is an equidigital number, since it uses as much as digits as its factorization.

1159643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16404.

The product of its digits is 3240, while the sum is 29.

The square root of 1159643 is about 1076.8672155842. The cubic root of 1159643 is about 105.0609774309.

The spelling of 1159643 in words is "one million, one hundred fifty-nine thousand, six hundred forty-three".