1260144169 has 4 divisors (see below), whose sum is σ = 1273135444. Its totient is φ = 1247152896.

The previous prime is 1260144167. The next prime is 1260144173. The reversal of 1260144169 is 9614410621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 922944400 + 337199769 = 30380^2 + 18363^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260144169 - 2¹ = 1260144167 is a prime.

It is a super-2 number, since 2×1260144169² = 3175926653329401122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260144167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6495492 + ... + 6495685.

It is an arithmetic number, because the mean of its divisors is an integer number (318283861).

Almost surely, 2^1260144169 is an apocalyptic number.

It is an amenable number.

1260144169 is a deficient number, since it is larger than the sum of its proper divisors (12991275).

1260144169 is an equidigital number, since it uses as much as digits as its factorization.

1260144169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12991274.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1260144169 is about 35498.5093912406. The cubic root of 1260144169 is about 1080.1234909660.

The spelling of 1260144169 in words is "one billion, two hundred sixty million, one hundred forty-four thousand, one hundred sixty-nine".