1580042749 has 2 divisors, whose sum is σ = 1580042750. Its totient is φ = 1580042748.

The previous prime is 1580042729. The next prime is 1580042759. The reversal of 1580042749 is 9472400851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019205625 + 560837124 = 31925^2 + 23682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1580042749 - 2²¹ = 1577945597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1580042729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790021374 + 790021375.

It is an arithmetic number, because the mean of its divisors is an integer number (790021375).

Almost surely, 2^1580042749 is an apocalyptic number.

It is an amenable number.

1580042749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1580042749 is an equidigital number, since it uses as much as digits as its factorization.

1580042749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1580042749 is about 39749.7515589720. The cubic root of 1580042749 is about 1164.7237887057.

The spelling of 1580042749 in words is "one billion, five hundred eighty million, forty-two thousand, seven hundred forty-nine".