1024721 has 2 divisors, whose sum is σ = 1024722. Its totient is φ = 1024720.

The previous prime is 1024711. The next prime is 1024729. The reversal of 1024721 is 1274201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 483025 = 736^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024721 - 2¹⁰ = 1023697 is a prime.

It is a Chen prime.

It is equal to p₈₀₃₁₅ and since 1024721 and 80315 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1024721.

It is not a weakly prime, because it can be changed into another prime (1024729) 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 as a sum of consecutive naturals, namely, 512360 + 512361.

It is an arithmetic number, because the mean of its divisors is an integer number (512361).

2^1024721 is an apocalyptic number.

It is an amenable number.

1024721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024721 is an equidigital number, since it uses as much as digits as its factorization.

1024721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1024721 is about 1012.2850389095. The cubic root of 1024721 is about 100.8173347717.

Adding to 1024721 its reverse (1274201), we get a palindrome (2298922).

The spelling of 1024721 in words is "one million, twenty-four thousand, seven hundred twenty-one".