1265975166 has 16 divisors (see below), whose sum is σ = 2532668688. Its totient is φ = 421872000.

The previous prime is 1265975143. The next prime is 1265975171. The reversal of 1265975166 is 6615795621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5485 + ... + 50616.

It is an arithmetic number, because the mean of its divisors is an integer number (158291793).

Almost surely, 2^1265975166 is an apocalyptic number.

1265975166 is an abundant number, since it is smaller than the sum of its proper divisors (1266693522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265975166 is a wasteful number, since it uses less digits than its factorization.

1265975166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59867.

The product of its digits is 680400, while the sum is 48.

The square root of 1265975166 is about 35580.5447681735. The cubic root of 1265975166 is about 1081.7869269047.

The spelling of 1265975166 in words is "one billion, two hundred sixty-five million, nine hundred seventy-five thousand, one hundred sixty-six".