11721701 has 4 divisors (see below), whose sum is σ = 11733792.
Its totient is φ = 11709612.
The previous prime is 11721691. The next prime is 11721733. The reversal of 11721701 is 10712711.
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 not a de Polignac number, because 11721701 - 218 = 11459557 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11721781) 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, 4451 + ... + 6576.
It is an arithmetic number, because the mean of its divisors is an integer number (2933448).
Almost surely, 211721701 is an apocalyptic number.
It is an amenable number.
11721701 is a deficient number, since it is larger than the sum of its proper divisors (12091).
11721701 is a wasteful number, since it uses less digits than its factorization.
11721701 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12090.
The product of its (nonzero) digits is 98, while the sum is 20.
The square root of 11721701 is about 3423.6969784138.
The cubic root of 11721701 is about 227.1591385407.
The spelling of 11721701 in words is "eleven million, seven hundred twenty-one thousand, seven hundred one".