1296253505 has 8 divisors (see below), whose sum is σ = 1560475752. Its totient is φ = 1033688448.

The previous prime is 1296253487. The next prime is 1296253507. The reversal of 1296253505 is 5053526921.

It can be written as a sum of positive squares in 4 ways, for example, as 166823056 + 1129430449 = 12916^2 + 33607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1296253505 - 2¹⁶ = 1296187969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296253507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412574 + ... + 415703.

It is an arithmetic number, because the mean of its divisors is an integer number (195059469).

Almost surely, 2^1296253505 is an apocalyptic number.

It is an amenable number.

1296253505 is a deficient number, since it is larger than the sum of its proper divisors (264222247).

1296253505 is an equidigital number, since it uses as much as digits as its factorization.

1296253505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828595.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 1296253505 is about 36003.5207306174. The cubic root of 1296253505 is about 1090.3434388974.

The spelling of 1296253505 in words is "one billion, two hundred ninety-six million, two hundred fifty-three thousand, five hundred five".