1290538875265 has 8 divisors (see below), whose sum is σ = 1548674035560. Its totient is φ = 1032412843392.

The previous prime is 1290538875233. The next prime is 1290538875337. The reversal of 1290538875265 is 5625788350921.

It can be written as a sum of positive squares in 4 ways, for example, as 346063945984 + 944474929281 = 588272^2 + 971841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1290538875265 - 2⁵ = 1290538875233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967124 + ... + 2539813.

It is an arithmetic number, because the mean of its divisors is an integer number (193584254445).

Almost surely, 2^{1290538875265} is an apocalyptic number.

It is an amenable number.

1290538875265 is a deficient number, since it is larger than the sum of its proper divisors (258135160295).

1290538875265 is an equidigital number, since it uses as much as digits as its factorization.

1290538875265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564211.

The product of its (nonzero) digits is 36288000, while the sum is 61.

The spelling of 1290538875265 in words is "one trillion, two hundred ninety billion, five hundred thirty-eight million, eight hundred seventy-five thousand, two hundred sixty-five".