1000409 has 2 divisors, whose sum is σ = 1000410. Its totient is φ = 1000408.

The previous prime is 1000403. The next prime is 1000423. The reversal of 1000409 is 9040001.

It is an a-pointer prime, because the next prime (1000423) can be obtained adding 1000409 to its sum of digits (14).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 6400 = 997^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000409 - 2⁴ = 1000393 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000393 and 1000402.

It is not a weakly prime, because it can be changed into another prime (1000403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500204 + 500205.

It is an arithmetic number, because the mean of its divisors is an integer number (500205).

2^1000409 is an apocalyptic number.

It is an amenable number.

1000409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000409 is an equidigital number, since it uses as much as digits as its factorization.

1000409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1000409 is about 1000.2044790942. The cubic root of 1000409 is about 100.0136314751.

The spelling of 1000409 in words is "one million, four hundred nine", and thus it is an aban number.