1101899 has 4 divisors (see below), whose sum is σ = 1105560. Its totient is φ = 1098240.

The previous prime is 1101883. The next prime is 1101901. The reversal of 1101899 is 9981011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101899 - 2⁴ = 1101883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101839) 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, 1334 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (276390).

2^1101899 is an apocalyptic number.

1101899 is a deficient number, since it is larger than the sum of its proper divisors (3661).

1101899 is an equidigital number, since it uses as much as digits as its factorization.

1101899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1101899 is about 1049.7137705108. The cubic root of 1101899 is about 103.2873804231.

Subtracting from 1101899 its sum of digits (29), we obtain a triangular number (1101870 = T₁₄₈₄).

The spelling of 1101899 in words is "one million, one hundred one thousand, eight hundred ninety-nine".