10194721 has 8 divisors (see below), whose sum is σ = 10512320. Its totient is φ = 9879408.

The previous prime is 10194707. The next prime is 10194731. The reversal of 10194721 is 12749101.

10194721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10194721 - 2⁷ = 10194593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10194731) 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, 13660 + ... + 14386.

It is an arithmetic number, because the mean of its divisors is an integer number (1314040).

Almost surely, 2^10194721 is an apocalyptic number.

It is an amenable number.

10194721 is a deficient number, since it is larger than the sum of its proper divisors (317599).

10194721 is an equidigital number, since it uses as much as digits as its factorization.

10194721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 10194721 is about 3192.9173180651. The cubic root of 10194721 is about 216.8328684003.

The spelling of 10194721 in words is "ten million, one hundred ninety-four thousand, seven hundred twenty-one".