1265745105 has 24 divisors (see below), whose sum is σ = 2194837632. Its totient is φ = 674793504.

The previous prime is 1265745083. The next prime is 1265745121. The reversal of 1265745105 is 5015475621.

1265745105 is a `hidden beast` number, since 12 + 65 + 74 + 510 + 5 = 666.

It is not a de Polignac number, because 1265745105 - 2⁹ = 1265744593 is a prime.

It is a super-2 number, since 2×1265745105² = 3204221341662922050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265745105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163942 + ... + 171488.

It is an arithmetic number, because the mean of its divisors is an integer number (91451568).

Almost surely, 2^1265745105 is an apocalyptic number.

1265745105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265745105 is a deficient number, since it is larger than the sum of its proper divisors (929092527).

1265745105 is a wasteful number, since it uses less digits than its factorization.

1265745105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11285 (or 11282 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 1265745105 is about 35577.3116606637. The cubic root of 1265745105 is about 1081.7213932181.

The spelling of 1265745105 in words is "one billion, two hundred sixty-five million, seven hundred forty-five thousand, one hundred five".