1040057021 has 2 divisors, whose sum is σ = 1040057022. Its totient is φ = 1040057020.

The previous prime is 1040057003. The next prime is 1040057047. The reversal of 1040057021 is 1207500401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923308996 + 116748025 = 30386^2 + 10805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040057021 - 2²⁶ = 972948157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040056984 and 1040057002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040057521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520028510 + 520028511.

It is an arithmetic number, because the mean of its divisors is an integer number (520028511).

Almost surely, 2^1040057021 is an apocalyptic number.

It is an amenable number.

1040057021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040057021 is an equidigital number, since it uses as much as digits as its factorization.

1040057021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1040057021 is about 32249.9150541517. The cubic root of 1040057021 is about 1013.1779199441.

Adding to 1040057021 its reverse (1207500401), we get a palindrome (2247557422).

The spelling of 1040057021 in words is "one billion, forty million, fifty-seven thousand, twenty-one".