1020449 has 4 divisors (see below), whose sum is σ = 1045380. Its totient is φ = 995520.

The previous prime is 1020431. The next prime is 1020451. The reversal of 1020449 is 9440201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9440201 = 53 ⋅178117.

It can be written as a sum of positive squares in 2 ways, for example, as 20449 + 1000000 = 143^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020449 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1020449.

It is not an unprimeable number, because it can be changed into a prime (1020419) 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, 12404 + ... + 12485.

It is an arithmetic number, because the mean of its divisors is an integer number (261345).

2^1020449 is an apocalyptic number.

It is an amenable number.

1020449 is a deficient number, since it is larger than the sum of its proper divisors (24931).

1020449 is an equidigital number, since it uses as much as digits as its factorization.

1020449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24930.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1020449 is about 1010.1727575024. The cubic root of 1020449 is about 100.6770391682.

The spelling of 1020449 in words is "one million, twenty thousand, four hundred forty-nine".