1025564369 has 2 divisors, whose sum is σ = 1025564370. Its totient is φ = 1025564368.

The previous prime is 1025564359. The next prime is 1025564429. The reversal of 1025564369 is 9634655201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 927811600 + 97752769 = 30460^2 + 9887^2 .

It is an emirp because it is prime and its reverse (9634655201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025564369 - 2²⁸ = 757128913 is a prime.

It is a super-2 number, since 2×1025564369² = 2103564549924736322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1025564339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512782184 + 512782185.

It is an arithmetic number, because the mean of its divisors is an integer number (512782185).

Almost surely, 2^1025564369 is an apocalyptic number.

It is an amenable number.

1025564369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025564369 is an equidigital number, since it uses as much as digits as its factorization.

1025564369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 1025564369 is about 32024.4339372299. The cubic root of 1025564369 is about 1008.4498551742.

The spelling of 1025564369 in words is "one billion, twenty-five million, five hundred sixty-four thousand, three hundred sixty-nine".