10087921 has 2 divisors, whose sum is σ = 10087922. Its totient is φ = 10087920.

The previous prime is 10087897. The next prime is 10087933. The reversal of 10087921 is 12978001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 409600 = 3111^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 10087921 - 2¹⁵ = 10055153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10087921.

It is not a weakly prime, because it can be changed into another prime (10085921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5043960 + 5043961.

It is an arithmetic number, because the mean of its divisors is an integer number (5043961).

Almost surely, 2^10087921 is an apocalyptic number.

It is an amenable number.

10087921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10087921 is an equidigital number, since it uses as much as digits as its factorization.

10087921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 10087921 is about 3176.1487685560. The cubic root of 10087921 is about 216.0730277192.

The spelling of 10087921 in words is "ten million, eighty-seven thousand, nine hundred twenty-one".