1091600 has 30 divisors (see below), whose sum is σ = 2623530. Its totient is φ = 436480.

The previous prime is 1091591. The next prime is 1091609. The reversal of 1091600 is 61901.

It is an interprime number because it is at equal distance from previous prime (1091591) and next prime (1091609).

It can be written as a sum of positive squares in 3 ways, for example, as 295936 + 795664 = 544^2 + 892^2 .

It is not an unprimeable number, because it can be changed into a prime (1091609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 965 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (87451).

2^1091600 is an apocalyptic number.

1091600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091600 is an abundant number, since it is smaller than the sum of its proper divisors (1531930).

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

1091600 is a wasteful number, since it uses less digits than its factorization.

1091600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1091600 is about 1044.7966309287. The cubic root of 1091600 is about 102.9645776331.

The spelling of 1091600 in words is "one million, ninety-one thousand, six hundred".