1009445 has 4 divisors (see below), whose sum is σ = 1211340. Its totient is φ = 807552.

The previous prime is 1009439. The next prime is 1009457. The reversal of 1009445 is 5449001.

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 556516 + 452929 = 746^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009445 - 2⁸ = 1009189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1009445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100940 + ... + 100949.

It is an arithmetic number, because the mean of its divisors is an integer number (302835).

2^1009445 is an apocalyptic number.

It is an amenable number.

1009445 is a deficient number, since it is larger than the sum of its proper divisors (201895).

1009445 is an equidigital number, since it uses as much as digits as its factorization.

1009445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201894.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1009445 is about 1004.7114013487. The cubic root of 1009445 is about 100.3138473016.

The spelling of 1009445 in words is "one million, nine thousand, four hundred forty-five".