1265776072 has 96 divisors (see below), whose sum is σ = 2793061440. Its totient is φ = 533120000.

The previous prime is 1265776037. The next prime is 1265776091. The reversal of 1265776072 is 2706775621.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1805322 + ... + 1806022.

It is an arithmetic number, because the mean of its divisors is an integer number (29094390).

Almost surely, 2^1265776072 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 1265776072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396530720).

1265776072 is an abundant number, since it is smaller than the sum of its proper divisors (1527285368).

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

1265776072 is a wasteful number, since it uses less digits than its factorization.

1265776072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 1265776072 is about 35577.7468651403. The cubic root of 1265776072 is about 1081.7302147396.

The spelling of 1265776072 in words is "one billion, two hundred sixty-five million, seven hundred seventy-six thousand, seventy-two".