1291946902 has 8 divisors (see below), whose sum is σ = 1938805056. Its totient is φ = 645678552.

The previous prime is 1291946899. The next prime is 1291946927. The reversal of 1291946902 is 2096491921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141933 + ... + 150760.

It is an arithmetic number, because the mean of its divisors is an integer number (242350632).

Almost surely, 2^1291946902 is an apocalyptic number.

1291946902 is a deficient number, since it is larger than the sum of its proper divisors (646858154).

1291946902 is a wasteful number, since it uses less digits than its factorization.

1291946902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294902.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1291946902 is about 35943.6628906960. The cubic root of 1291946902 is about 1089.1345996934.

The spelling of 1291946902 in words is "one billion, two hundred ninety-one million, nine hundred forty-six thousand, nine hundred two".