10921281 has 16 divisors (see below), whose sum is σ = 16689024. Its totient is φ = 6223104.

The previous prime is 10921277. The next prime is 10921283. The reversal of 10921281 is 18212901.

It is not a de Polignac number, because 10921281 - 2² = 10921277 is a prime.

It is a super-2 number, since 2×10921281² = 238548757361922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10921283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12015 + ... + 12891.

It is an arithmetic number, because the mean of its divisors is an integer number (1043064).

Almost surely, 2^10921281 is an apocalyptic number.

It is an amenable number.

10921281 is a deficient number, since it is larger than the sum of its proper divisors (5767743).

10921281 is an equidigital number, since it uses as much as digits as its factorization.

10921281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 10921281 is about 3304.7361468051. The cubic root of 10921281 is about 221.8662248993.

The spelling of 10921281 in words is "ten million, nine hundred twenty-one thousand, two hundred eighty-one".