1275402751264 has 96 divisors (see below), whose sum is σ = 2671934610240. Its totient is φ = 598319232000.

The previous prime is 1275402751261. The next prime is 1275402751283. The reversal of 1275402751264 is 4621572045721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1275402751261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4562739 + ... + 4834189.

It is an arithmetic number, because the mean of its divisors is an integer number (27832652190).

Almost surely, 2^{1275402751264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275402751264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1335967305120).

1275402751264 is an abundant number, since it is smaller than the sum of its proper divisors (1396531858976).

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

1275402751264 is a wasteful number, since it uses less digits than its factorization.

1275402751264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271634 (or 271626 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 46.

Adding to 1275402751264 its reverse (4621572045721), we get a palindrome (5896974796985).

The spelling of 1275402751264 in words is "one trillion, two hundred seventy-five billion, four hundred two million, seven hundred fifty-one thousand, two hundred sixty-four".