1580987 has 2 divisors, whose sum is σ = 1580988. Its totient is φ = 1580986.

The previous prime is 1580977. The next prime is 1581007. The reversal of 1580987 is 7890851.

It is a weak prime.

It is an emirp because it is prime and its reverse (7890851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1580987 - 2⁶ = 1580923 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1580987.

It is not a weakly prime, because it can be changed into another prime (1580977) by changing a digit.

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 as a sum of consecutive naturals, namely, 790493 + 790494.

It is an arithmetic number, because the mean of its divisors is an integer number (790494).

2^1580987 is an apocalyptic number.

1580987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1580987 is an equidigital number, since it uses as much as digits as its factorization.

1580987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1580987 is about 1257.3730552227. The cubic root of 1580987 is about 116.4955759770.

The spelling of 1580987 in words is "one million, five hundred eighty thousand, nine hundred eighty-seven".