1009845 has 12 divisors (see below), whose sum is σ = 1750476. Its totient is φ = 538560.

The previous prime is 1009843. The next prime is 1009859. The reversal of 1009845 is 5489001.

It can be written as a sum of positive squares in 2 ways, for example, as 161604 + 848241 = 402^2 + 921^2 .

It is not a de Polignac number, because 1009845 - 2¹ = 1009843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009843) 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, 11176 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (145873).

2^1009845 is an apocalyptic number.

1009845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1009845 is a deficient number, since it is larger than the sum of its proper divisors (740631).

1009845 is a wasteful number, since it uses less digits than its factorization.

1009845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22452 (or 22449 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1009845 is about 1004.9104437710. The cubic root of 1009845 is about 100.3270955849.

The spelling of 1009845 in words is "one million, nine thousand, eight hundred forty-five".