12409725 has 12 divisors (see below), whose sum is σ = 20517536. Its totient is φ = 6618480.

The previous prime is 12409723. The next prime is 12409729. The reversal of 12409725 is 52790421.

It is not a de Polignac number, because 12409725 - 2¹ = 12409723 is a prime.

It is a super-3 number, since 3×12409725³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12409692 and 12409701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82657 + ... + 82806.

Almost surely, 2^12409725 is an apocalyptic number.

12409725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12409725 is a deficient number, since it is larger than the sum of its proper divisors (8107811).

12409725 is a wasteful number, since it uses less digits than its factorization.

12409725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165476 (or 165471 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12409725 is about 3522.7439589048. The cubic root of 12409725 is about 231.5193987230.

The spelling of 12409725 in words is "twelve million, four hundred nine thousand, seven hundred twenty-five".