1296421963 has 4 divisors (see below), whose sum is σ = 1309008688. Its totient is φ = 1283835240.

The previous prime is 1296421949. The next prime is 1296422027. The reversal of 1296421963 is 3691246921.

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 1296421963 - 2²⁵ = 1262867531 is a prime.

It is a super-2 number, since 2×1296421963² = 3361419812297546738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296421913) 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, 6293208 + ... + 6293413.

It is an arithmetic number, because the mean of its divisors is an integer number (327252172).

Almost surely, 2^1296421963 is an apocalyptic number.

1296421963 is a deficient number, since it is larger than the sum of its proper divisors (12586725).

1296421963 is a wasteful number, since it uses less digits than its factorization.

1296421963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12586724.

The product of its digits is 139968, while the sum is 43.

The square root of 1296421963 is about 36005.8601202638. The cubic root of 1296421963 is about 1090.3906696585.

The spelling of 1296421963 in words is "one billion, two hundred ninety-six million, four hundred twenty-one thousand, nine hundred sixty-three".