1265281032 has 64 divisors (see below), whose sum is σ = 3404246400. Its totient is φ = 390435840.

The previous prime is 1265281013. The next prime is 1265281153. The reversal of 1265281032 is 2301825621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532 + ... + 50307.

It is an arithmetic number, because the mean of its divisors is an integer number (53191350).

Almost surely, 2^1265281032 is an apocalyptic number.

1265281032 is a gapful number since it is divisible by the number (12) 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 1265281032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702123200).

1265281032 is an abundant number, since it is smaller than the sum of its proper divisors (2138965368).

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

1265281032 is a wasteful number, since it uses less digits than its factorization.

1265281032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50926 (or 50922 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1265281032 is about 35570.7890269530. The cubic root of 1265281032 is about 1081.5891762197.

The spelling of 1265281032 in words is "one billion, two hundred sixty-five million, two hundred eighty-one thousand, thirty-two".