1097945 has 8 divisors (see below), whose sum is σ = 1395144. Its totient is φ = 826624.

The previous prime is 1097933. The next prime is 1097947. The reversal of 1097945 is 5497901.

It can be written as a sum of positive squares in 4 ways, for example, as 246016 + 851929 = 496^2 + 923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1097945 - 2²⁰ = 49369 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6374 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (174393).

2^1097945 is an apocalyptic number.

It is an amenable number.

1097945 is a deficient number, since it is larger than the sum of its proper divisors (297199).

1097945 is a wasteful number, since it uses less digits than its factorization.

1097945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12939.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1097945 is about 1047.8287073754. The cubic root of 1097945 is about 103.1636885752.

The spelling of 1097945 in words is "one million, ninety-seven thousand, nine hundred forty-five".