10721817 has 6 divisors (see below), whose sum is σ = 15487082. Its totient is φ = 7147872.

The previous prime is 10721807. The next prime is 10721819. The reversal of 10721817 is 71812701.

It can be written as a sum of positive squares in only one way, i.e., 10653696 + 68121 = 3264^2 + 261^2 .

It is not a de Polignac number, because 10721817 - 2¹⁰ = 10720793 is a prime.

It is a super-2 number, since 2×10721817² = 229914719562978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10721819) 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 5 ways as a sum of consecutive naturals, for example, 595648 + ... + 595665.

Almost surely, 2^10721817 is an apocalyptic number.

It is an amenable number.

10721817 is a deficient number, since it is larger than the sum of its proper divisors (4765265).

10721817 is a wasteful number, since it uses less digits than its factorization.

10721817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191319 (or 1191316 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 10721817 is about 3274.4185743426. The cubic root of 10721817 is about 220.5072112655.

The spelling of 10721817 in words is "ten million, seven hundred twenty-one thousand, eight hundred seventeen".