1296245069 has 6 divisors (see below), whose sum is σ = 1507876974. Its totient is φ = 1111067160.

The previous prime is 1296245057. The next prime is 1296245117. The reversal of 1296245069 is 9605426921.

It can be written as a sum of positive squares in only one way, i.e., 1287015625 + 9229444 = 35875^2 + 3038^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1296245069 is a prime.

It is a super-3 number, since 3×1296245069³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296245029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13226942 + ... + 13227039.

It is an arithmetic number, because the mean of its divisors is an integer number (251312829).

Almost surely, 2^1296245069 is an apocalyptic number.

It is an amenable number.

1296245069 is a deficient number, since it is larger than the sum of its proper divisors (211631905).

1296245069 is an equidigital number, since it uses as much as digits as its factorization.

1296245069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26453995 (or 26453988 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1296245069 is about 36003.4035752177. The cubic root of 1296245069 is about 1090.3410735789.

The spelling of 1296245069 in words is "one billion, two hundred ninety-six million, two hundred forty-five thousand, sixty-nine".