1099259 has 4 divisors (see below), whose sum is σ = 1256304. Its totient is φ = 942216.

The previous prime is 1099249. The next prime is 1099261. The reversal of 1099259 is 9529901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9529901 = 563 ⋅16927.

It is a cyclic number.

It is not a de Polignac number, because 1099259 - 2²⁰ = 50683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1099249) 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, 78512 + ... + 78525.

It is an arithmetic number, because the mean of its divisors is an integer number (314076).

2^1099259 is an apocalyptic number.

1099259 is a deficient number, since it is larger than the sum of its proper divisors (157045).

1099259 is an equidigital number, since it uses as much as digits as its factorization.

1099259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157044.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 1099259 is about 1048.4555307689. The cubic root of 1099259 is about 103.2048269581.

The spelling of 1099259 in words is "one million, ninety-nine thousand, two hundred fifty-nine".