1260405169 has 2 divisors, whose sum is σ = 1260405170. Its totient is φ = 1260405168.

The previous prime is 1260405127. The next prime is 1260405173. The reversal of 1260405169 is 9615040621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696960000 + 563445169 = 26400^2 + 23737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260405169 is a prime.

It is a super-2 number, since 2×1260405169² = 3177242380083837122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1260405269) 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 as a sum of consecutive naturals, namely, 630202584 + 630202585.

It is an arithmetic number, because the mean of its divisors is an integer number (630202585).

Almost surely, 2^1260405169 is an apocalyptic number.

It is an amenable number.

1260405169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260405169 is an equidigital number, since it uses as much as digits as its factorization.

1260405169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1260405169 is about 35502.1854116053. The cubic root of 1260405169 is about 1080.1980572410.

The spelling of 1260405169 in words is "one billion, two hundred sixty million, four hundred five thousand, one hundred sixty-nine".