1265464285440 has 288 divisors, whose sum is σ = 4104673284096. Its totient is φ = 332203253760.

The previous prime is 1265464285427. The next prime is 1265464285451. The reversal of 1265464285440 is 445824645621.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202568397 + ... + 202574643.

It is an arithmetic number, because the mean of its divisors is an integer number (14252337792).

Almost surely, 2^{1265464285440} is an apocalyptic number.

1265464285440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265464285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052336642048).

1265464285440 is an abundant number, since it is smaller than the sum of its proper divisors (2839208998656).

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

1265464285440 is an equidigital number, since it uses as much as digits as its factorization.

1265464285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7085 (or 7071 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 51.

The spelling of 1265464285440 in words is "one trillion, two hundred sixty-five billion, four hundred sixty-four million, two hundred eighty-five thousand, four hundred forty".