1265641752 has 32 divisors (see below), whose sum is σ = 3194830080. Its totient is φ = 417783840.

The previous prime is 1265641717. The next prime is 1265641759. The reversal of 1265641752 is 2571465621.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1265641752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265641759) 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, 253524 + ... + 258467.

It is an arithmetic number, because the mean of its divisors is an integer number (99838440).

Almost surely, 2^1265641752 is an apocalyptic number.

1265641752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265641752 is an abundant number, since it is smaller than the sum of its proper divisors (1929188328).

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

1265641752 is a wasteful number, since it uses less digits than its factorization.

1265641752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512103 (or 512099 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 1265641752 is about 35575.8591182279. The cubic root of 1265641752 is about 1081.6919501667.

The spelling of 1265641752 in words is "one billion, two hundred sixty-five million, six hundred forty-one thousand, seven hundred fifty-two".