1091340 has 96 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 278208.

The previous prime is 1091339. The next prime is 1091359. The reversal of 1091340 is 431901.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23197 + ... + 23243.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2^1091340 is an apocalyptic number.

1091340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774080).

1091340 is an abundant number, since it is smaller than the sum of its proper divisors (2456820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091340 is a wasteful number, since it uses less digits than its factorization.

1091340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1091340 is about 1044.6721973902. The cubic root of 1091340 is about 102.9564021977.

It can be divided in two parts, 1091 and 340, that added together give a triangular number (1431 = T₅₃).

The spelling of 1091340 in words is "one million, ninety-one thousand, three hundred forty".