12409501 has 12 divisors (see below), whose sum is σ = 13593972. Its totient is φ = 11321856.

The previous prime is 12409471. The next prime is 12409519. The reversal of 12409501 is 10590421.

It can be written as a sum of positive squares in 6 ways, for example, as 1512900 + 10896601 = 1230^2 + 3301^2 .

It is not a de Polignac number, because 12409501 - 2⁷ = 12409373 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 (12409531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16015 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (1132831).

Almost surely, 2^12409501 is an apocalyptic number.

It is an amenable number.

12409501 is a deficient number, since it is larger than the sum of its proper divisors (1184471).

12409501 is an equidigital number, since it uses as much as digits as its factorization.

12409501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12409501 is about 3522.7121653635. The cubic root of 12409501 is about 231.5180057119.

Adding to 12409501 its reverse (10590421), we get a palindrome (22999922).

The spelling of 12409501 in words is "twelve million, four hundred nine thousand, five hundred one".