1296000001 has 8 divisors (see below), whose sum is σ = 1304365608. Its totient is φ = 1287648000.

The previous prime is 1295999987. The next prime is 1296000011. The reversal of 1296000001 is 1000006921.

It is a Cunningham number, because it is equal to 36000²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 1296000000 = 1^2 + 36000^2 .

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 1296000001 - 2²¹ = 1293902849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296000011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243711 + ... + 248971.

It is an arithmetic number, because the mean of its divisors is an integer number (163045701).

Almost surely, 2^1296000001 is an apocalyptic number.

It is an amenable number.

1296000001 is a deficient number, since it is larger than the sum of its proper divisors (8365607).

1296000001 is a wasteful number, since it uses less digits than its factorization.

1296000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1296000001 is about 36000.0000138889. Note that the first 4 decimals coincide. The cubic root of 1296000001 is about 1090.2723559797.

Adding to 1296000001 its reverse (1000006921), we get a palindrome (2296006922).

The spelling of 1296000001 in words is "one billion, two hundred ninety-six million, one", and thus it is an aban number.