11725409 has 4 divisors (see below), whose sum is σ = 12103680. Its totient is φ = 11347140.

The previous prime is 11725403. The next prime is 11725429. The reversal of 11725409 is 90452711.

11725409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11725409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11725403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189089 + ... + 189150.

It is an arithmetic number, because the mean of its divisors is an integer number (3025920).

Almost surely, 2^11725409 is an apocalyptic number.

It is an amenable number.

11725409 is a deficient number, since it is larger than the sum of its proper divisors (378271).

11725409 is an equidigital number, since it uses as much as digits as its factorization.

11725409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378270.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 11725409 is about 3424.2384554817. The cubic root of 11725409 is about 227.1830889123.

The spelling of 11725409 in words is "eleven million, seven hundred twenty-five thousand, four hundred nine".