1091116 has 12 divisors (see below), whose sum is σ = 2056432. Its totient is φ = 503568.

The previous prime is 1091071. The next prime is 1091119. The reversal of 1091116 is 6111901.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1091093 and 1091102.

It is not an unprimeable number, because it can be changed into a prime (1091119) 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, 10440 + ... + 10543.

2^1091116 is an apocalyptic number.

It is an amenable number.

1091116 is a deficient number, since it is larger than the sum of its proper divisors (965316).

1091116 is a wasteful number, since it uses less digits than its factorization.

1091116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000 (or 20998 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1091116 is about 1044.5649812242. The cubic root of 1091116 is about 102.9493577043.

It can be divided in two parts, 109 and 1116, that added together give a triangular number (1225 = T₄₉).

The spelling of 1091116 in words is "one million, ninety-one thousand, one hundred sixteen".