1291584001 has 4 divisors (see below), whose sum is σ = 1300252500. Its totient is φ = 1282915504.

The previous prime is 1291583981. The next prime is 1291584013. The reversal of 1291584001 is 1004851921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 345960000 + 945624001 = 18600^2 + 30751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291584001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291584101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334026 + ... + 4334323.

It is an arithmetic number, because the mean of its divisors is an integer number (325063125).

Almost surely, 2^1291584001 is an apocalyptic number.

It is an amenable number.

1291584001 is a deficient number, since it is larger than the sum of its proper divisors (8668499).

1291584001 is an equidigital number, since it uses as much as digits as its factorization.

1291584001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8668498.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1291584001 is about 35938.6143444624. The cubic root of 1291584001 is about 1089.0326127753.

The spelling of 1291584001 in words is "one billion, two hundred ninety-one million, five hundred eighty-four thousand, one".