1291040972 has 12 divisors (see below), whose sum is σ = 2433115776. Its totient is φ = 595865040.

The previous prime is 1291040953. The next prime is 1291040977. The reversal of 1291040972 is 2790401921.

It is not an unprimeable number, because it can be changed into a prime (1291040977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12413804 + ... + 12413907.

It is an arithmetic number, because the mean of its divisors is an integer number (202759648).

Almost surely, 2^1291040972 is an apocalyptic number.

It is an amenable number.

1291040972 is a deficient number, since it is larger than the sum of its proper divisors (1142074804).

1291040972 is a wasteful number, since it uses less digits than its factorization.

1291040972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24827728 (or 24827726 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1291040972 is about 35931.0585983770. The cubic root of 1291040972 is about 1088.8799683768.

The spelling of 1291040972 in words is "one billion, two hundred ninety-one million, forty thousand, nine hundred seventy-two".