1044012821 has 2 divisors, whose sum is σ = 1044012822. Its totient is φ = 1044012820.

The previous prime is 1044012811. The next prime is 1044012829. The reversal of 1044012821 is 1282104401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1044000721 + 12100 = 32311^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044012821 - 2¹⁰ = 1044011797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044012829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522006410 + 522006411.

It is an arithmetic number, because the mean of its divisors is an integer number (522006411).

Almost surely, 2^1044012821 is an apocalyptic number.

It is an amenable number.

1044012821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044012821 is an equidigital number, since it uses as much as digits as its factorization.

1044012821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1044012821 is about 32311.1872421921. The cubic root of 1044012821 is about 1014.4608171095.

The spelling of 1044012821 in words is "one billion, forty-four million, twelve thousand, eight hundred twenty-one".