11721546 has 24 divisors (see below), whose sum is σ = 25721280. Its totient is φ = 3857256.

The previous prime is 11721527. The next prime is 11721547. The reversal of 11721546 is 64512711.

It is a happy number.

11721546 is a `hidden beast` number, since 117 + 2 + 1 + 546 = 666.

It is not an unprimeable number, because it can be changed into a prime (11721547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2700 + ... + 5543.

It is an arithmetic number, because the mean of its divisors is an integer number (1071720).

Almost surely, 2^11721546 is an apocalyptic number.

11721546 is an abundant number, since it is smaller than the sum of its proper divisors (13999734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11721546 is a wasteful number, since it uses less digits than its factorization.

11721546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330 (or 8327 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 11721546 is about 3423.6743419899. The cubic root of 11721546 is about 227.1581372690.

The spelling of 11721546 in words is "eleven million, seven hundred twenty-one thousand, five hundred forty-six".