10289921 has 4 divisors (see below), whose sum is σ = 10371072. Its totient is φ = 10208772.

The previous prime is 10289911. The next prime is 10289941. The reversal of 10289921 is 12998201.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12998201 = 67 ⋅194003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10289921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10289911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40385 + ... + 40638.

It is an arithmetic number, because the mean of its divisors is an integer number (2592768).

Almost surely, 2^10289921 is an apocalyptic number.

It is an amenable number.

10289921 is a deficient number, since it is larger than the sum of its proper divisors (81151).

10289921 is an equidigital number, since it uses as much as digits as its factorization.

10289921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81150.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 10289921 is about 3207.7906727216. The cubic root of 10289921 is about 217.5057187909.

The spelling of 10289921 in words is "ten million, two hundred eighty-nine thousand, nine hundred twenty-one".