13125409 has 8 divisors (see below), whose sum is σ = 15072480. Its totient is φ = 11304000.

The previous prime is 13125407. The next prime is 13125419. The reversal of 13125409 is 90452131.

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 13125409 - 2¹ = 13125407 is a prime.

It is a super-2 number, since 2×13125409² = 344552722834562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13125401) 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, 31192 + ... + 31609.

It is an arithmetic number, because the mean of its divisors is an integer number (1884060).

Almost surely, 2^13125409 is an apocalyptic number.

13125409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13125409 is a deficient number, since it is larger than the sum of its proper divisors (1947071).

13125409 is a wasteful number, since it uses less digits than its factorization.

13125409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62831.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13125409 is about 3622.9006334704. The cubic root of 13125409 is about 235.8871491959.

The spelling of 13125409 in words is "thirteen million, one hundred twenty-five thousand, four hundred nine".