1038721 has 2 divisors, whose sum is σ = 1038722. Its totient is φ = 1038720.

The previous prime is 1038707. The next prime is 1038727. The reversal of 1038721 is 1278301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 497025 = 736^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1038721 - 2⁵ = 1038689 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1038692 and 1038701.

It is not a weakly prime, because it can be changed into another prime (1038727) 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, 519360 + 519361.

It is an arithmetic number, because the mean of its divisors is an integer number (519361).

2^1038721 is an apocalyptic number.

It is an amenable number.

1038721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1038721 is an equidigital number, since it uses as much as digits as its factorization.

1038721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1038721 is about 1019.1766284604. The cubic root of 1038721 is about 101.2743903035.

The spelling of 1038721 in words is "one million, thirty-eight thousand, seven hundred twenty-one".