1259409 has 4 divisors (see below), whose sum is σ = 1679216. Its totient is φ = 839604.

The previous prime is 1259393. The next prime is 1259413. The reversal of 1259409 is 9049521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1259409 - 2⁴ = 1259393 is a prime.

It is a super-2 number, since 2×1259409² = 3172222058562, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1259429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 209899 + ... + 209904.

It is an arithmetic number, because the mean of its divisors is an integer number (419804).

2^1259409 is an apocalyptic number.

It is an amenable number.

1259409 is a deficient number, since it is larger than the sum of its proper divisors (419807).

1259409 is an equidigital number, since it uses as much as digits as its factorization.

1259409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419806.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1259409 is about 1122.2339328322. The cubic root of 1259409 is about 107.9913401836.

The spelling of 1259409 in words is "one million, two hundred fifty-nine thousand, four hundred nine".