1291912066 has 8 divisors (see below), whose sum is σ = 1947052944. Its totient is φ = 642894420.

The previous prime is 1291912051. The next prime is 1291912103. The reversal of 1291912066 is 6602191921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530280 + ... + 1531123.

It is an arithmetic number, because the mean of its divisors is an integer number (243381618).

Almost surely, 2^1291912066 is an apocalyptic number.

1291912066 is a deficient number, since it is larger than the sum of its proper divisors (655140878).

1291912066 is a wasteful number, since it uses less digits than its factorization.

1291912066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061616.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1291912066 is about 35943.1782957490. The cubic root of 1291912066 is about 1089.1248104795.

The spelling of 1291912066 in words is "one billion, two hundred ninety-one million, nine hundred twelve thousand, sixty-six".