1098445 has 4 divisors (see below), whose sum is σ = 1318140. Its totient is φ = 878752.

The previous prime is 1098443. The next prime is 1098451. The reversal of 1098445 is 5448901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 299209 = 894^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098445 - 2¹ = 1098443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109840 + ... + 109849.

It is an arithmetic number, because the mean of its divisors is an integer number (329535).

2^1098445 is an apocalyptic number.

It is an amenable number.

1098445 is a deficient number, since it is larger than the sum of its proper divisors (219695).

1098445 is an equidigital number, since it uses as much as digits as its factorization.

1098445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219694.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1098445 is about 1048.0672688334. The cubic root of 1098445 is about 103.1793463165.

The spelling of 1098445 in words is "one million, ninety-eight thousand, four hundred forty-five".