1265323052940 has 144 divisors (see below), whose sum is σ = 3927204594432. Its totient is φ = 303763733504.

The previous prime is 1265323052927. The next prime is 1265323052947. The reversal of 1265323052940 is 492503235621.

It is a junction number, because it is equal to n+sod(n) for n = 1265323052892 and 1265323052901.

It is not an unprimeable number, because it can be changed into a prime (1265323052947) 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 47 ways as a sum of consecutive naturals, for example, 1187514 + ... + 1985153.

It is an arithmetic number, because the mean of its divisors is an integer number (27272254128).

Almost surely, 2^{1265323052940} is an apocalyptic number.

1265323052940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265323052940 is an abundant number, since it is smaller than the sum of its proper divisors (2661881541492).

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

1265323052940 is a wasteful number, since it uses less digits than its factorization.

1265323052940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172736 (or 3172717 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 1265323052940 in words is "one trillion, two hundred sixty-five billion, three hundred twenty-three million, fifty-two thousand, nine hundred forty".