1265135606 has 64 divisors (see below), whose sum is σ = 2341785600. Its totient is φ = 511560000.

The previous prime is 1265135603. The next prime is 1265135609. The reversal of 1265135606 is 6065315621.

It is an interprime number because it is at equal distance from previous prime (1265135603) and next prime (1265135609).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265135603) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 871181 + ... + 872631.

It is an arithmetic number, because the mean of its divisors is an integer number (36590400).

Almost surely, 2^1265135606 is an apocalyptic number.

1265135606 is a deficient number, since it is larger than the sum of its proper divisors (1076649994).

1265135606 is a wasteful number, since it uses less digits than its factorization.

1265135606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1532 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1265135606 is about 35568.7447908975. The cubic root of 1265135606 is about 1081.5477368846.

The spelling of 1265135606 in words is "one billion, two hundred sixty-five million, one hundred thirty-five thousand, six hundred six".