11401721 has 8 divisors (see below), whose sum is σ = 11940864. Its totient is φ = 10866240.

The previous prime is 11401717. The next prime is 11401723. The reversal of 11401721 is 12710411.

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 11401721 - 2² = 11401717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11401721.

It is not an unprimeable number, because it can be changed into a prime (11401723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7016 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (1492608).

Almost surely, 2^11401721 is an apocalyptic number.

It is an amenable number.

11401721 is a deficient number, since it is larger than the sum of its proper divisors (539143).

11401721 is a wasteful number, since it uses less digits than its factorization.

11401721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 11401721 is about 3376.6434517136. The cubic root of 11401721 is about 225.0730363717.

The spelling of 11401721 in words is "eleven million, four hundred one thousand, seven hundred twenty-one".