1296158263 has 8 divisors (see below), whose sum is σ = 1302917616. Its totient is φ = 1289409600.

The previous prime is 1296158257. The next prime is 1296158273. The reversal of 1296158263 is 3628516921.

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 1296158263 - 2⁵ = 1296158231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296158243) 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, 364273 + ... + 367813.

It is an arithmetic number, because the mean of its divisors is an integer number (162864702).

Almost surely, 2^1296158263 is an apocalyptic number.

1296158263 is a deficient number, since it is larger than the sum of its proper divisors (6759353).

1296158263 is a wasteful number, since it uses less digits than its factorization.

1296158263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345.

The product of its digits is 155520, while the sum is 43.

The square root of 1296158263 is about 36002.1980301203. The cubic root of 1296158263 is about 1090.3167339788.

The spelling of 1296158263 in words is "one billion, two hundred ninety-six million, one hundred fifty-eight thousand, two hundred sixty-three".