10721867 has 6 divisors (see below), whose sum is σ = 11610252. Its totient is φ = 9896952.

The previous prime is 10721863. The next prime is 10721873. The reversal of 10721867 is 76812701.

10721867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10721867 - 2² = 10721863 is a prime.

It is a super-2 number, since 2×10721867² = 229916863931378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10721861) 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, 31553 + ... + 31890.

It is an arithmetic number, because the mean of its divisors is an integer number (1935042).

Almost surely, 2^10721867 is an apocalyptic number.

10721867 is a deficient number, since it is larger than the sum of its proper divisors (888385).

10721867 is an equidigital number, since it uses as much as digits as its factorization.

10721867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63469 (or 63456 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 10721867 is about 3274.4262092770. The cubic root of 10721867 is about 220.5075540353.

The spelling of 10721867 in words is "ten million, seven hundred twenty-one thousand, eight hundred sixty-seven".