1021554041 has 2 divisors, whose sum is σ = 1021554042. Its totient is φ = 1021554040.

The previous prime is 1021554031. The next prime is 1021554047. The reversal of 1021554041 is 1404551201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623950441 + 397603600 = 24979^2 + 19940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021554041 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021553998 and 1021554016.

It is not a weakly prime, because it can be changed into another prime (1021554047) 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, 510777020 + 510777021.

It is an arithmetic number, because the mean of its divisors is an integer number (510777021).

Almost surely, 2^1021554041 is an apocalyptic number.

It is an amenable number.

1021554041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021554041 is an equidigital number, since it uses as much as digits as its factorization.

1021554041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1021554041 is about 31961.7590410791. The cubic root of 1021554041 is about 1007.1336700755.

The spelling of 1021554041 in words is "one billion, twenty-one million, five hundred fifty-four thousand, forty-one".