1097845 has 12 divisors (see below), whose sum is σ = 1532844. Its totient is φ = 752640.

The previous prime is 1097819. The next prime is 1097849. The reversal of 1097845 is 5487901.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 636804 + 461041 = 798^2 + 679^2 .

It is not a de Polignac number, because 1097845 - 2⁷ = 1097717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1097845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1996 + ... + 2485.

It is an arithmetic number, because the mean of its divisors is an integer number (127737).

2^1097845 is an apocalyptic number.

It is an amenable number.

1097845 is a deficient number, since it is larger than the sum of its proper divisors (434999).

1097845 is an equidigital number, since it uses as much as digits as its factorization.

1097845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1097845 is about 1047.7809885658. The cubic root of 1097845 is about 103.1605564566.

The spelling of 1097845 in words is "one million, ninety-seven thousand, eight hundred forty-five".