1296547668 has 48 divisors (see below), whose sum is σ = 3619994560. Its totient is φ = 398937312.

The previous prime is 1296547661. The next prime is 1296547691. The reversal of 1296547668 is 8667456921.

1296547668 is a `hidden beast` number, since 1 + 2 + 96 + 547 + 6 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296547661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460330 + ... + 463137.

Almost surely, 2^1296547668 is an apocalyptic number.

1296547668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1296547668 is an abundant number, since it is smaller than the sum of its proper divisors (2323446892).

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

1296547668 is a wasteful number, since it uses less digits than its factorization.

1296547668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923493 (or 923485 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1296547668 is about 36007.6056965747. The cubic root of 1296547668 is about 1090.4259110468.

The spelling of 1296547668 in words is "one billion, two hundred ninety-six million, five hundred forty-seven thousand, six hundred sixty-eight".