1296504049 has 3 divisors (see below), whose sum is σ = 1296540057. Its totient is φ = 1296468042.

The previous prime is 1296504019. The next prime is 1296504107. The reversal of 1296504049 is 9404056921.

The square root of 1296504049 is 36007.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1296504049 - 2⁷ = 1296503921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296504019) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18004 + ... + 54010.

It is an arithmetic number, because the mean of its divisors is an integer number (432180019).

Almost surely, 2^1296504049 is an apocalyptic number.

1296504049 is the 36007-th square number.

1296504049 is the 18004-th centered octagonal number.

It is an amenable number.

1296504049 is a deficient number, since it is larger than the sum of its proper divisors (36008).

1296504049 is an frugal number, since it uses more digits than its factorization.

1296504049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72014 (or 36007 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The cubic root of 1296504049 is about 1090.4136827212.

The spelling of 1296504049 in words is "one billion, two hundred ninety-six million, five hundred four thousand, forty-nine".