10821530 has 8 divisors (see below), whose sum is σ = 19478772. Its totient is φ = 4328608.

The previous prime is 10821529. The next prime is 10821541. The reversal of 10821530 is 3512801.

It can be written as a sum of positive squares in 2 ways, for example, as 10804369 + 17161 = 3287^2 + 131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 541067 + ... + 541086.

Almost surely, 2^10821530 is an apocalyptic number.

10821530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10821530 is a deficient number, since it is larger than the sum of its proper divisors (8657242).

10821530 is a wasteful number, since it uses less digits than its factorization.

10821530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082160.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 10821530 is about 3289.6093993056. The cubic root of 10821530 is about 221.1886761216.

The spelling of 10821530 in words is "ten million, eight hundred twenty-one thousand, five hundred thirty".