1291329160 has 32 divisors (see below), whose sum is σ = 3169627200. Its totient is φ = 469574080.

The previous prime is 1291329157. The next prime is 1291329161. The reversal of 1291329160 is 619231921.

It is not an unprimeable number, because it can be changed into a prime (1291329161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466980 + ... + 1467859.

It is an arithmetic number, because the mean of its divisors is an integer number (99050850).

Almost surely, 2^1291329160 is an apocalyptic number.

1291329160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291329160 is an abundant number, since it is smaller than the sum of its proper divisors (1878298040).

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

1291329160 is a wasteful number, since it uses less digits than its factorization.

1291329160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934861 (or 2934857 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1291329160 is about 35935.0686655807. The cubic root of 1291329160 is about 1088.9609827936.

The spelling of 1291329160 in words is "one billion, two hundred ninety-one million, three hundred twenty-nine thousand, one hundred sixty".