1107891 has 16 divisors (see below), whose sum is σ = 1687200. Its totient is φ = 717984.

The previous prime is 1107881. The next prime is 1107893. The reversal of 1107891 is 1987011.

It is not a de Polignac number, because 1107891 - 2⁷ = 1107763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1107893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (105450).

2^1107891 is an apocalyptic number.

1107891 is the 666-th heptagonal number.

1107891 is a deficient number, since it is larger than the sum of its proper divisors (579309).

1107891 is a wasteful number, since it uses less digits than its factorization.

1107891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1107891 is about 1052.5640123052. The cubic root of 1107891 is about 103.4742637123.

It can be divided in two parts, 110 and 7891, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 1107891 in words is "one million, one hundred seven thousand, eight hundred ninety-one".