1580242 has 4 divisors (see below), whose sum is σ = 2370366. Its totient is φ = 790120.

The previous prime is 1580213. The next prime is 1580251. The reversal of 1580242 is 2420851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2420851 = 17 ⋅142403.

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 89401 = 1221^2 + 299^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395059 + ... + 395062.

2^1580242 is an apocalyptic number.

1580242 is a deficient number, since it is larger than the sum of its proper divisors (790124).

1580242 is an equidigital number, since it uses as much as digits as its factorization.

1580242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790123.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1580242 is about 1257.0767677433. The cubic root of 1580242 is about 116.4772745741.

The spelling of 1580242 in words is "one million, five hundred eighty thousand, two hundred forty-two".