1265605 has 8 divisors (see below), whose sum is σ = 1656864. Its totient is φ = 920400.

The previous prime is 1265603. The next prime is 1265611. The reversal of 1265605 is 5065621.

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

It is not a de Polignac number, because 1265605 - 2¹ = 1265603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265603) 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, 11451 + ... + 11560.

It is an arithmetic number, because the mean of its divisors is an integer number (207108).

2^1265605 is an apocalyptic number.

It is an amenable number.

1265605 is a deficient number, since it is larger than the sum of its proper divisors (391259).

1265605 is a wasteful number, since it uses less digits than its factorization.

1265605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23027.

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

The square root of 1265605 is about 1124.9911110760. The cubic root of 1265605 is about 108.1681479924.

The spelling of 1265605 in words is "one million, two hundred sixty-five thousand, six hundred five".