1330409 has 8 divisors (see below), whose sum is σ = 1401288. Its totient is φ = 1261440.

The previous prime is 1330397. The next prime is 1330411. The reversal of 1330409 is 9040331.

It can be written as a sum of positive squares in 4 ways, for example, as 336400 + 994009 = 580^2 + 997^2 .

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 1330409 - 2⁴ = 1330393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330499) 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, 1079 + ... + 1955.

It is an arithmetic number, because the mean of its divisors is an integer number (175161).

2^1330409 is an apocalyptic number.

It is an amenable number.

1330409 is a deficient number, since it is larger than the sum of its proper divisors (70879).

1330409 is an equidigital number, since it uses as much as digits as its factorization.

1330409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1330409 is about 1153.4335698253. The cubic root of 1330409 is about 109.9837165979.

The spelling of 1330409 in words is "one million, three hundred thirty thousand, four hundred nine".