10721306 has 4 divisors (see below), whose sum is σ = 16081962. Its totient is φ = 5360652.

The previous prime is 10721297. The next prime is 10721309. The reversal of 10721306 is 60312701.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9703225 + 1018081 = 3115^2 + 1009^2 .

It is a super-2 number, since 2×10721306² = 229892804691272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680325 + ... + 2680328.

Almost surely, 2^10721306 is an apocalyptic number.

10721306 is a deficient number, since it is larger than the sum of its proper divisors (5360656).

10721306 is an equidigital number, since it uses as much as digits as its factorization.

10721306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360655.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 10721306 is about 3274.3405442929. The cubic root of 10721306 is about 220.5037080977.

The spelling of 10721306 in words is "ten million, seven hundred twenty-one thousand, three hundred six".