1099255 has 4 divisors (see below), whose sum is σ = 1319112. Its totient is φ = 879400.

The previous prime is 1099249. The next prime is 1099261. The reversal of 1099255 is 5529901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5529901 = 13 ⋅425377.

It is an interprime number because it is at equal distance from previous prime (1099249) and next prime (1099261).

It is not a de Polignac number, because 1099255 - 2³ = 1099247 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1099255 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109921 + ... + 109930.

It is an arithmetic number, because the mean of its divisors is an integer number (329778).

2^1099255 is an apocalyptic number.

1099255 is a deficient number, since it is larger than the sum of its proper divisors (219857).

1099255 is an equidigital number, since it uses as much as digits as its factorization.

1099255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219856.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 1099255 is about 1048.4536231994. The cubic root of 1099255 is about 103.2047017769.

The spelling of 1099255 in words is "one million, ninety-nine thousand, two hundred fifty-five".