1264630621 has 2 divisors, whose sum is σ = 1264630622. Its totient is φ = 1264630620.

The previous prime is 1264630583. The next prime is 1264630649. The reversal of 1264630621 is 1260364621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262025625 + 2604996 = 35525^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264630621 - 2⁹ = 1264630109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264630651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632315310 + 632315311.

It is an arithmetic number, because the mean of its divisors is an integer number (632315311).

Almost surely, 2^1264630621 is an apocalyptic number.

It is an amenable number.

1264630621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264630621 is an equidigital number, since it uses as much as digits as its factorization.

1264630621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1264630621 is about 35561.6453640717. The cubic root of 1264630621 is about 1081.4038160628.

The spelling of 1264630621 in words is "one billion, two hundred sixty-four million, six hundred thirty thousand, six hundred twenty-one".