1265000605 has 8 divisors (see below), whose sum is σ = 1656000864. Its totient is φ = 920000400.

The previous prime is 1265000603. The next prime is 1265000609. The reversal of 1265000605 is 5060005621.

1265000605 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1265000605 - 2¹ = 1265000603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265000605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265000603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11499951 + ... + 11500060.

It is an arithmetic number, because the mean of its divisors is an integer number (207000108).

Almost surely, 2^1265000605 is an apocalyptic number.

It is an amenable number.

1265000605 is a deficient number, since it is larger than the sum of its proper divisors (391000259).

1265000605 is a wasteful number, since it uses less digits than its factorization.

1265000605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23000027.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1265000605 is about 35566.8469926700. The cubic root of 1265000605 is about 1081.5092653249.

The spelling of 1265000605 in words is "one billion, two hundred sixty-five million, six hundred five", and thus it is an aban number.