1164563021 has 2 divisors, whose sum is σ = 1164563022. Its totient is φ = 1164563020.

The previous prime is 1164562969. The next prime is 1164563033. The reversal of 1164563021 is 1203654611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713637796 + 450925225 = 26714^2 + 21235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1164563021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1164563041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582281510 + 582281511.

It is an arithmetic number, because the mean of its divisors is an integer number (582281511).

Almost surely, 2^1164563021 is an apocalyptic number.

It is an amenable number.

1164563021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1164563021 is an equidigital number, since it uses as much as digits as its factorization.

1164563021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1164563021 is about 34125.6944398206. The cubic root of 1164563021 is about 1052.0934864296.

The spelling of 1164563021 in words is "one billion, one hundred sixty-four million, five hundred sixty-three thousand, twenty-one".