10603721 has 4 divisors (see below), whose sum is σ = 10613652. Its totient is φ = 10593792.

The previous prime is 10603709. The next prime is 10603753. The reversal of 10603721 is 12730601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7590025 + 3013696 = 2755^2 + 1736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10603721 is a prime.

It is a super-2 number, since 2×10603721² = 224877798091682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10603693 and 10603702.

It is not an unprimeable number, because it can be changed into a prime (10600721) 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 3 ways as a sum of consecutive naturals, for example, 3140 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (2653413).

Almost surely, 2^10603721 is an apocalyptic number.

It is an amenable number.

10603721 is a deficient number, since it is larger than the sum of its proper divisors (9931).

10603721 is an equidigital number, since it uses as much as digits as its factorization.

10603721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9930.

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

The square root of 10603721 is about 3256.3355171112. The cubic root of 10603721 is about 219.6946245228.

The spelling of 10603721 in words is "ten million, six hundred three thousand, seven hundred twenty-one".