10721224 has 8 divisors (see below), whose sum is σ = 20102310. Its totient is φ = 5360608.

The previous prime is 10721219. The next prime is 10721261. The reversal of 10721224 is 42212701.

It is a happy number.

10721224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9108324 + 1612900 = 3018^2 + 1270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×10721224² = 229889288116352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670069 + ... + 670084.

Almost surely, 2^10721224 is an apocalyptic number.

It is an amenable number.

10721224 is a deficient number, since it is larger than the sum of its proper divisors (9381086).

10721224 is a wasteful number, since it uses less digits than its factorization.

10721224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340159 (or 1340155 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 10721224 is about 3274.3280226636. The cubic root of 10721224 is about 220.5031459351.

Adding to 10721224 its reverse (42212701), we get a palindrome (52933925).

The spelling of 10721224 in words is "ten million, seven hundred twenty-one thousand, two hundred twenty-four".