1040555521 has 2 divisors, whose sum is σ = 1040555522. Its totient is φ = 1040555520.

The previous prime is 1040555471. The next prime is 1040555561. The reversal of 1040555521 is 1255550401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994519296 + 46036225 = 31536^2 + 6785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040555521 - 2¹⁵ = 1040522753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1040555521.

It is not a weakly prime, because it can be changed into another prime (1040555561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520277760 + 520277761.

It is an arithmetic number, because the mean of its divisors is an integer number (520277761).

Almost surely, 2^1040555521 is an apocalyptic number.

It is an amenable number.

1040555521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040555521 is an equidigital number, since it uses as much as digits as its factorization.

1040555521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1040555521 is about 32257.6428308083. The cubic root of 1040555521 is about 1013.3397663657.

The spelling of 1040555521 in words is "one billion, forty million, five hundred fifty-five thousand, five hundred twenty-one".