10397721 has 8 divisors (see below), whose sum is σ = 14006944. Its totient is φ = 6860160.

The previous prime is 10397711. The next prime is 10397753. The reversal of 10397721 is 12779301.

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

It is not a de Polignac number, because 10397721 - 2⁹ = 10397209 is a prime.

It is a super-2 number, since 2×10397721² = 216225203987682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10397711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17575 + ... + 18156.

It is an arithmetic number, because the mean of its divisors is an integer number (1750868).

Almost surely, 2^10397721 is an apocalyptic number.

It is an amenable number.

10397721 is a deficient number, since it is larger than the sum of its proper divisors (3609223).

10397721 is an equidigital number, since it uses as much as digits as its factorization.

10397721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35831.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 10397721 is about 3224.5497360097. The cubic root of 10397721 is about 218.2626313168.

The spelling of 10397721 in words is "ten million, three hundred ninety-seven thousand, seven hundred twenty-one".