1253564909 has 2 divisors, whose sum is σ = 1253564910. Its totient is φ = 1253564908.

The previous prime is 1253564903. The next prime is 1253564941. The reversal of 1253564909 is 9094653521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817674025 + 435890884 = 28595^2 + 20878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253564909 - 2¹² = 1253560813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1253564909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253564903) 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, 626782454 + 626782455.

It is an arithmetic number, because the mean of its divisors is an integer number (626782455).

Almost surely, 2^1253564909 is an apocalyptic number.

It is an amenable number.

1253564909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253564909 is an equidigital number, since it uses as much as digits as its factorization.

1253564909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 1253564909 is about 35405.7185917755. The cubic root of 1253564909 is about 1078.2404215337.

The spelling of 1253564909 in words is "one billion, two hundred fifty-three million, five hundred sixty-four thousand, nine hundred nine".