1265326216 has 96 divisors (see below), whose sum is σ = 3053868480. Its totient is φ = 485923200.

The previous prime is 1265326199. The next prime is 1265326217. The reversal of 1265326216 is 6126235621.

It is not an unprimeable number, because it can be changed into a prime (1265326217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304086 + ... + 308218.

It is an arithmetic number, because the mean of its divisors is an integer number (31811130).

Almost surely, 2^1265326216 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 1265326216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526934240).

1265326216 is an abundant number, since it is smaller than the sum of its proper divisors (1788542264).

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

1265326216 is a wasteful number, since it uses less digits than its factorization.

1265326216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235 (or 4224 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 1265326216 is about 35571.4241491678. The cubic root of 1265326216 is about 1081.6020508150.

The spelling of 1265326216 in words is "one billion, two hundred sixty-five million, three hundred twenty-six thousand, two hundred sixteen".