1264145969 has 2 divisors, whose sum is σ = 1264145970. Its totient is φ = 1264145968.

The previous prime is 1264145957. The next prime is 1264146007. The reversal of 1264145969 is 9695414621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 888755344 + 375390625 = 29812^2 + 19375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264145969 is a prime.

It is a super-2 number, since 2×1264145969² = 3196130061877897922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1264145929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632072984 + 632072985.

It is an arithmetic number, because the mean of its divisors is an integer number (632072985).

Almost surely, 2^1264145969 is an apocalyptic number.

It is an amenable number.

1264145969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264145969 is an equidigital number, since it uses as much as digits as its factorization.

1264145969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 1264145969 is about 35554.8304594467. The cubic root of 1264145969 is about 1081.2656541153.

The spelling of 1264145969 in words is "one billion, two hundred sixty-four million, one hundred forty-five thousand, nine hundred sixty-nine".