1294105664 has 84 divisors (see below), whose sum is σ = 2710377612. Its totient is φ = 612817920.

The previous prime is 1294105663. The next prime is 1294105691. The reversal of 1294105664 is 4665014921.

It can be written as a sum of positive squares in 2 ways, for example, as 900480064 + 393625600 = 30008^2 + 19840^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1294105663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3259514 + ... + 3259910.

Almost surely, 2^1294105664 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 1294105664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355188806).

1294105664 is an abundant number, since it is smaller than the sum of its proper divisors (1416271948).

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

1294105664 is an equidigital number, since it uses as much as digits as its factorization.

1294105664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1294105664 is about 35973.6801564700. The cubic root of 1294105664 is about 1089.7408872630.

The spelling of 1294105664 in words is "one billion, two hundred ninety-four million, one hundred five thousand, six hundred sixty-four".