1296495720 has 160 divisors (see below), whose sum is σ = 4693023720. Its totient is φ = 319127040.

The previous prime is 1296495703. The next prime is 1296495743. The reversal of 1296495720 is 275946921.

1296495720 is a `hidden beast` number, since 1 + 2 + 96 + 495 + 72 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 614345796 + 682149924 = 24786^2 + 26118^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 26730 + ... + 57510.

Almost surely, 2^1296495720 is an apocalyptic number.

1296495720 is a gapful number since it is divisible by the number (10) 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 1296495720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346511860).

1296495720 is an abundant number, since it is smaller than the sum of its proper divisors (3396528000).

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

1296495720 is a wasteful number, since it uses less digits than its factorization.

1296495720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30817 (or 30804 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1296495720 is about 36006.8843417478. The cubic root of 1296495720 is about 1090.4113477047.

The spelling of 1296495720 in words is "one billion, two hundred ninety-six million, four hundred ninety-five thousand, seven hundred twenty".