1291568160 has 48 divisors (see below), whose sum is σ = 4068441216. Its totient is φ = 344418048.

The previous prime is 1291568137. The next prime is 1291568203. The reversal of 1291568160 is 618651921.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344904 + ... + 1345863.

It is an arithmetic number, because the mean of its divisors is an integer number (84759192).

Almost surely, 2^1291568160 is an apocalyptic number.

1291568160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291568160 is an abundant number, since it is smaller than the sum of its proper divisors (2776873056).

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

1291568160 is a wasteful number, since it uses less digits than its factorization.

1291568160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690785 (or 2690777 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1291568160 is about 35938.3939540987. The cubic root of 1291568160 is about 1089.0281605068.

The spelling of 1291568160 in words is "one billion, two hundred ninety-one million, five hundred sixty-eight thousand, one hundred sixty".