1538842 has 4 divisors (see below), whose sum is σ = 2308266. Its totient is φ = 769420.

The previous prime is 1538839. The next prime is 1538851. The reversal of 1538842 is 2488351.

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

It can be written as a sum of positive squares in only one way, i.e., 1535121 + 3721 = 1239^2 + 61^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 3.

It is an unprimeable number.

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, 384709 + ... + 384712.

2^1538842 is an apocalyptic number.

1538842 is a deficient number, since it is larger than the sum of its proper divisors (769424).

1538842 is an equidigital number, since it uses as much as digits as its factorization.

1538842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769423.

The product of its digits is 7680, while the sum is 31.

The square root of 1538842 is about 1240.5007053605. The cubic root of 1538842 is about 115.4510827753.

The spelling of 1538842 in words is "one million, five hundred thirty-eight thousand, eight hundred forty-two".