10721447 has 6 divisors (see below), whose sum is σ = 11784864. Its totient is φ = 9746660.

The previous prime is 10721419. The next prime is 10721461. The reversal of 10721447 is 74412701.

10721447 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10721447 - 2⁶ = 10721383 is a prime.

It is a super-2 number, since 2×10721447² = 229898851547618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44183 + ... + 44424.

It is an arithmetic number, because the mean of its divisors is an integer number (1964144).

Almost surely, 2^10721447 is an apocalyptic number.

10721447 is a deficient number, since it is larger than the sum of its proper divisors (1063417).

10721447 is an equidigital number, since it uses as much as digits as its factorization.

10721447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88629 (or 88618 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 10721447 is about 3274.3620752751. The cubic root of 10721447 is about 220.5046747363.

The spelling of 10721447 in words is "ten million, seven hundred twenty-one thousand, four hundred forty-seven".