12575409 has 48 divisors (see below), whose sum is σ = 21705600. Its totient is φ = 6468000.

The previous prime is 12575399. The next prime is 12575417. The reversal of 12575409 is 90457521.

It is not a de Polignac number, because 12575409 - 2⁷ = 12575281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 12575409.

It is not an unprimeable number, because it can be changed into a prime (12575419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124459 + ... + 124559.

It is an arithmetic number, because the mean of its divisors is an integer number (452200).

Almost surely, 2^12575409 is an apocalyptic number.

It is an amenable number.

12575409 is a deficient number, since it is larger than the sum of its proper divisors (9130191).

12575409 is a wasteful number, since it uses less digits than its factorization.

12575409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 12575409 is about 3546.1823134182. The cubic root of 12575409 is about 232.5451964396.

It can be divided in two parts, 1257 and 5409, that added together give a palindrome (6666).

The spelling of 12575409 in words is "twelve million, five hundred seventy-five thousand, four hundred nine".