1296632515 has 4 divisors (see below), whose sum is σ = 1555959024. Its totient is φ = 1037306008.

The previous prime is 1296632489. The next prime is 1296632537. The reversal of 1296632515 is 5152366921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1296632515 - 2⁷ = 1296632387 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 129663247 + ... + 129663256.

It is an arithmetic number, because the mean of its divisors is an integer number (388989756).

Almost surely, 2^1296632515 is an apocalyptic number.

1296632515 is a deficient number, since it is larger than the sum of its proper divisors (259326509).

1296632515 is an equidigital number, since it uses as much as digits as its factorization.

1296632515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259326508.

The product of its digits is 97200, while the sum is 40.

The square root of 1296632515 is about 36008.7838589420. The cubic root of 1296632515 is about 1090.4496966099.

The spelling of 1296632515 in words is "one billion, two hundred ninety-six million, six hundred thirty-two thousand, five hundred fifteen".