1580879 has 4 divisors (see below), whose sum is σ = 1586184. Its totient is φ = 1575576.

The previous prime is 1580861. The next prime is 1580897. The reversal of 1580879 is 9780851.

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

It is an interprime number because it is at equal distance from previous prime (1580861) and next prime (1580897).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1580879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1580849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2177 + ... + 2810.

It is an arithmetic number, because the mean of its divisors is an integer number (396546).

2^1580879 is an apocalyptic number.

1580879 is a deficient number, since it is larger than the sum of its proper divisors (5305).

1580879 is an equidigital number, since it uses as much as digits as its factorization.

1580879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304.

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

The square root of 1580879 is about 1257.3301078078. The cubic root of 1580879 is about 116.4929232441.

The spelling of 1580879 in words is "one million, five hundred eighty thousand, eight hundred seventy-nine".