10098721 has 2 divisors, whose sum is σ = 10098722. Its totient is φ = 10098720.

The previous prime is 10098719. The next prime is 10098791. The reversal of 10098721 is 12789001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 239121 = 3140^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 10098721 - 2¹ = 10098719 is a prime.

Together with 10098719, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 10098721.

It is not a weakly prime, because it can be changed into another prime (10098701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5049360 + 5049361.

It is an arithmetic number, because the mean of its divisors is an integer number (5049361).

Almost surely, 2^10098721 is an apocalyptic number.

It is an amenable number.

10098721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10098721 is an equidigital number, since it uses as much as digits as its factorization.

10098721 is an evil number, because the sum of its binary digits is even.

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

The square root of 10098721 is about 3177.8484860043. The cubic root of 10098721 is about 216.1501085641.

It can be divided in two parts, 1009 and 8721, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 10098721 in words is "ten million, ninety-eight thousand, seven hundred twenty-one".