1296141265 has 16 divisors (see below), whose sum is σ = 1615375440. Its totient is φ = 997539840.

The previous prime is 1296141263. The next prime is 1296141269. The reversal of 1296141265 is 5621416921.

It can be written as a sum of positive squares in 8 ways, for example, as 1868689 + 1294272576 = 1367^2 + 35976^2 .

It is not a de Polignac number, because 1296141265 - 2¹ = 1296141263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (1296141263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22896 + ... + 55825.

It is an arithmetic number, because the mean of its divisors is an integer number (100960965).

Almost surely, 2^1296141265 is an apocalyptic number.

It is an amenable number.

1296141265 is a deficient number, since it is larger than the sum of its proper divisors (319234175).

1296141265 is an equidigital number, since it uses as much as digits as its factorization.

1296141265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78852.

The product of its digits is 25920, while the sum is 37.

The square root of 1296141265 is about 36001.9619604265. The cubic root of 1296141265 is about 1090.3119677694.

The spelling of 1296141265 in words is "one billion, two hundred ninety-six million, one hundred forty-one thousand, two hundred sixty-five".