1265132660 has 24 divisors (see below), whose sum is σ = 2898304416. Its totient is φ = 460048160.

The previous prime is 1265132657. The next prime is 1265132669. The reversal of 1265132660 is 662315621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265132669) 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, 2875082 + ... + 2875521.

It is an arithmetic number, because the mean of its divisors is an integer number (120762684).

Almost surely, 2^1265132660 is an apocalyptic number.

1265132660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265132660 is an abundant number, since it is smaller than the sum of its proper divisors (1633171756).

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

1265132660 is a wasteful number, since it uses less digits than its factorization.

1265132660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750623 (or 5750621 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1265132660 is about 35568.7033781104. The cubic root of 1265132660 is about 1081.5468973851.

The spelling of 1265132660 in words is "one billion, two hundred sixty-five million, one hundred thirty-two thousand, six hundred sixty".