1296394620 has 48 divisors (see below), whose sum is σ = 3656042880. Its totient is φ = 343215936.

The previous prime is 1296394613. The next prime is 1296394633. The reversal of 1296394620 is 264936921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69382 + ... + 86061.

It is an arithmetic number, because the mean of its divisors is an integer number (76167560).

Almost surely, 2^1296394620 is an apocalyptic number.

1296394620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296394620 is an abundant number, since it is smaller than the sum of its proper divisors (2359648260).

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

1296394620 is a wasteful number, since it uses less digits than its factorization.

1296394620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155594 (or 155592 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 1296394620 is about 36005.4804161811. The cubic root of 1296394620 is about 1090.3830037487.

The spelling of 1296394620 in words is "one billion, two hundred ninety-six million, three hundred ninety-four thousand, six hundred twenty".