10310921 has 4 divisors (see below), whose sum is σ = 10666500. Its totient is φ = 9955344.

The previous prime is 10310903. The next prime is 10310929. The reversal of 10310921 is 12901301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 4840000 = 2339^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10310921 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 10310921.

It is not an unprimeable number, because it can be changed into a prime (10310929) 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, 177746 + ... + 177803.

It is an arithmetic number, because the mean of its divisors is an integer number (2666625).

Almost surely, 2^10310921 is an apocalyptic number.

It is an amenable number.

10310921 is a deficient number, since it is larger than the sum of its proper divisors (355579).

10310921 is an equidigital number, since it uses as much as digits as its factorization.

10310921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355578.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 10310921 is about 3211.0622852882. The cubic root of 10310921 is about 217.6535824582.

The spelling of 10310921 in words is "ten million, three hundred ten thousand, nine hundred twenty-one".