11728571 has 8 divisors (see below), whose sum is σ = 12150144. Its totient is φ = 11309760.

The previous prime is 11728559. The next prime is 11728579. The reversal of 11728571 is 17582711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11728571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728579) 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, 11831 + ... + 12783.

It is an arithmetic number, because the mean of its divisors is an integer number (1518768).

Almost surely, 2^11728571 is an apocalyptic number.

11728571 is a deficient number, since it is larger than the sum of its proper divisors (421573).

11728571 is an equidigital number, since it uses as much as digits as its factorization.

11728571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

The product of its digits is 3920, while the sum is 32.

The square root of 11728571 is about 3424.7001328583. The cubic root of 11728571 is about 227.2035086226.

The spelling of 11728571 in words is "eleven million, seven hundred twenty-eight thousand, five hundred seventy-one".