10921287 has 16 divisors (see below), whose sum is σ = 15784160. Its totient is φ = 6716736.

The previous prime is 10921283. The next prime is 10921301. The reversal of 10921287 is 78212901.

10921287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10921287 - 2² = 10921283 is a prime.

It is a Duffinian number.

10921287 is a modest number, since divided by 1287 gives 1092 as remainder.

It is a congruent number.

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, 5763 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (986510).

Almost surely, 2^10921287 is an apocalyptic number.

10921287 is a deficient number, since it is larger than the sum of its proper divisors (4862873).

10921287 is an equidigital number, since it uses as much as digits as its factorization.

10921287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 10921287 is about 3304.7370545930. The cubic root of 10921287 is about 221.8662655293.

The spelling of 10921287 in words is "ten million, nine hundred twenty-one thousand, two hundred eighty-seven".