1009945 has 8 divisors (see below), whose sum is σ = 1275840. Its totient is φ = 765360.

The previous prime is 1009937. The next prime is 1009951. The reversal of 1009945 is 5499001.

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

It is not a de Polignac number, because 1009945 - 2³ = 1009937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5221 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (159480).

2^1009945 is an apocalyptic number.

It is an amenable number.

1009945 is a deficient number, since it is larger than the sum of its proper divisors (265895).

1009945 is a wasteful number, since it uses less digits than its factorization.

1009945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1009945 is about 1004.9601982168. The cubic root of 1009945 is about 100.3304071091.

The spelling of 1009945 in words is "one million, nine thousand, nine hundred forty-five".