11721954 has 8 divisors (see below), whose sum is σ = 23443920. Its totient is φ = 3907316.

The previous prime is 11721949. The next prime is 11721971. The reversal of 11721954 is 45912711.

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

11721954 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 976824 + ... + 976835.

It is an arithmetic number, because the mean of its divisors is an integer number (2930490).

Almost surely, 2^11721954 is an apocalyptic number.

11721954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11721954 is a wasteful number, since it uses less digits than its factorization.

11721954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953664.

The product of its digits is 2520, while the sum is 30.

The square root of 11721954 is about 3423.7339265778. The cubic root of 11721954 is about 227.1607728555.

The spelling of 11721954 in words is "eleven million, seven hundred twenty-one thousand, nine hundred fifty-four".