1275429163 has 4 divisors (see below), whose sum is σ = 1276056720. Its totient is φ = 1274801608.

The previous prime is 1275429157. The next prime is 1275429173. The reversal of 1275429163 is 3619245721.

It is a happy number.

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 1275429163 - 2²⁵ = 1241874731 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275429173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310720 + ... + 314797.

It is an arithmetic number, because the mean of its divisors is an integer number (319014180).

Almost surely, 2^1275429163 is an apocalyptic number.

1275429163 is a deficient number, since it is larger than the sum of its proper divisors (627557).

1275429163 is an equidigital number, since it uses as much as digits as its factorization.

1275429163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627556.

The product of its digits is 90720, while the sum is 40.

The square root of 1275429163 is about 35713.1511211206. The cubic root of 1275429163 is about 1084.4730926419.

The spelling of 1275429163 in words is "one billion, two hundred seventy-five million, four hundred twenty-nine thousand, one hundred sixty-three".