10246721 has 2 divisors, whose sum is σ = 10246722. Its totient is φ = 10246720.

The previous prime is 10246703. The next prime is 10246723. The reversal of 10246721 is 12764201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 261121 = 3160^2 + 511^2 .

It is an emirp because it is prime and its reverse (12764201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10246721 - 2¹⁸ = 9984577 is a prime.

It is a Sophie Germain prime.

Together with 10246723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10246723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5123360 + 5123361.

It is an arithmetic number, because the mean of its divisors is an integer number (5123361).

Almost surely, 2^10246721 is an apocalyptic number.

It is an amenable number.

10246721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10246721 is an equidigital number, since it uses as much as digits as its factorization.

10246721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 10246721 is about 3201.0499839896. The cubic root of 10246721 is about 217.2009083142.

The spelling of 10246721 in words is "ten million, two hundred forty-six thousand, seven hundred twenty-one".