1264332726 has 80 divisors (see below), whose sum is σ = 2911376160. Its totient is φ = 409950720.

The previous prime is 1264332709. The next prime is 1264332733. The reversal of 1264332726 is 6272334621.

1264332726 is a `hidden beast` number, since 1 + 2 + 643 + 3 + 2 + 7 + 2 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 957895 + ... + 959213.

It is an arithmetic number, because the mean of its divisors is an integer number (36392202).

Almost surely, 2^1264332726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264332726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455688080).

1264332726 is an abundant number, since it is smaller than the sum of its proper divisors (1647043434).

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

1264332726 is a wasteful number, since it uses less digits than its factorization.

1264332726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1482 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 1264332726 is about 35557.4566863267. The cubic root of 1264332726 is about 1081.3188979630.

It can be divided in two parts, 12643 and 32726, that added together give a square (45369 = 213²).

The spelling of 1264332726 in words is "one billion, two hundred sixty-four million, three hundred thirty-two thousand, seven hundred twenty-six".