1296191201 has 4 divisors (see below), whose sum is σ = 1296266772. Its totient is φ = 1296115632.

The previous prime is 1296191107. The next prime is 1296191207. The reversal of 1296191201 is 1021916921.

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 can be written as a sum of positive squares in 2 ways, for example, as 464445601 + 831745600 = 21551^2 + 28840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296191201 - 2³⁰ = 222449377 is a prime.

It is a super-2 number, since 2×1296191201² = 3360223259099644802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296191207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691 + ... + 50943.

It is an arithmetic number, because the mean of its divisors is an integer number (324066693).

Almost surely, 2^1296191201 is an apocalyptic number.

It is an amenable number.

1296191201 is a deficient number, since it is larger than the sum of its proper divisors (75571).

1296191201 is an equidigital number, since it uses as much as digits as its factorization.

1296191201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75570.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 1296191201 is about 36002.6554715065. The cubic root of 1296191201 is about 1090.3259696175.

The spelling of 1296191201 in words is "one billion, two hundred ninety-six million, one hundred ninety-one thousand, two hundred one".