1020909 has 8 divisors (see below), whose sum is σ = 1380672. Its totient is φ = 670880.

The previous prime is 1020907. The next prime is 1020913. The reversal of 1020909 is 9090201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1020909 - 2¹ = 1020907 is a prime.

1020909 is a modest number, since divided by 909 gives 102 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (172584).

2^1020909 is an apocalyptic number.

It is an amenable number.

1020909 is a deficient number, since it is larger than the sum of its proper divisors (359763).

1020909 is an equidigital number, since it uses as much as digits as its factorization.

1020909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1020909 is about 1010.4004156769. The cubic root of 1020909 is about 100.6921646934.

The spelling of 1020909 in words is "one million, twenty thousand, nine hundred nine".