10721403 has 56 divisors (see below), whose sum is σ = 20146176. Its totient is φ = 5540400.

The previous prime is 10721401. The next prime is 10721413. The reversal of 10721403 is 30412701.

It is not a de Polignac number, because 10721403 - 2¹ = 10721401 is a prime.

It is a super-2 number, since 2×10721403² = 229896964576818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 56038 + ... + 56228.

Almost surely, 2^10721403 is an apocalyptic number.

10721403 is a deficient number, since it is larger than the sum of its proper divisors (9424773).

10721403 is an equidigital number, since it uses as much as digits as its factorization.

10721403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 10721403 is about 3274.3553564022. The cubic root of 10721403 is about 220.5043730911.

The spelling of 10721403 in words is "ten million, seven hundred twenty-one thousand, four hundred three".