1296616572 has 120 divisors (see below), whose sum is σ = 3463891200. Its totient is φ = 422851104.

The previous prime is 1296616561. The next prime is 1296616613. The reversal of 1296616572 is 2756166921.

1296616572 is a `hidden beast` number, since 1 + 2 + 9 + 66 + 16 + 572 = 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, 4581543 + ... + 4581825.

It is an arithmetic number, because the mean of its divisors is an integer number (28865760).

Almost surely, 2^1296616572 is an apocalyptic number.

1296616572 is a gapful number since it is divisible by the number (12) 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 1296616572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731945600).

1296616572 is an abundant number, since it is smaller than the sum of its proper divisors (2167274628).

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

1296616572 is a wasteful number, since it uses less digits than its factorization.

1296616572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 546 counting only the distinct ones).

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

The square root of 1296616572 is about 36008.5624817209. The cubic root of 1296616572 is about 1090.4452273120.

The spelling of 1296616572 in words is "one billion, two hundred ninety-six million, six hundred sixteen thousand, five hundred seventy-two".