1296157275 has 96 divisors (see below), whose sum is σ = 2809344000. Its totient is φ = 573350400.

The previous prime is 1296157271. The next prime is 1296157283. The reversal of 1296157275 is 5727516921.

1296157275 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 1 + 572 + 75 = 666.

It is not a de Polignac number, because 1296157275 - 2² = 1296157271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1296157275.

It is not an unprimeable number, because it can be changed into a prime (1296157271) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142051 + ... + 150899.

It is an arithmetic number, because the mean of its divisors is an integer number (29264000).

Almost surely, 2^1296157275 is an apocalyptic number.

1296157275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1296157275 is an abundant number, since it is smaller than the sum of its proper divisors (1513186725).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296157275 is a wasteful number, since it uses less digits than its factorization.

1296157275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8906 (or 8895 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 1296157275 is about 36002.1843087333. The cubic root of 1296157275 is about 1090.3164569464.

The spelling of 1296157275 in words is "one billion, two hundred ninety-six million, one hundred fifty-seven thousand, two hundred seventy-five".