10681521 has 4 divisors (see below), whose sum is σ = 14242032. Its totient is φ = 7121012.

The previous prime is 10681507. The next prime is 10681523. The reversal of 10681521 is 12518601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10681521 - 2⁷ = 10681393 is a prime.

It is a super-2 number, since 2×10681521² = 228189781746882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10681491 and 10681500.

It is not an unprimeable number, because it can be changed into a prime (10681523) 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 3 ways as a sum of consecutive naturals, for example, 1780251 + ... + 1780256.

It is an arithmetic number, because the mean of its divisors is an integer number (3560508).

Almost surely, 2^10681521 is an apocalyptic number.

It is an amenable number.

10681521 is a deficient number, since it is larger than the sum of its proper divisors (3560511).

10681521 is an equidigital number, since it uses as much as digits as its factorization.

10681521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560510.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 10681521 is about 3268.2596286097. The cubic root of 10681521 is about 220.2306190464.

The spelling of 10681521 in words is "ten million, six hundred eighty-one thousand, five hundred twenty-one".