10249921 has 4 divisors (see below), whose sum is σ = 11181744. Its totient is φ = 9318100.

The previous prime is 10249879. The next prime is 10249937. The reversal of 10249921 is 12994201.

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.

It is not a de Polignac number, because 10249921 - 2⁹ = 10249409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10249921.

It is not an unprimeable number, because it can be changed into a prime (10249951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465895 + ... + 465916.

It is an arithmetic number, because the mean of its divisors is an integer number (2795436).

Almost surely, 2^10249921 is an apocalyptic number.

10249921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10249921 is a deficient number, since it is larger than the sum of its proper divisors (931823).

10249921 is an equidigital number, since it uses as much as digits as its factorization.

10249921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931822.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 10249921 is about 3201.5497809655. The cubic root of 10249921 is about 217.2235162154.

The spelling of 10249921 in words is "ten million, two hundred forty-nine thousand, nine hundred twenty-one".