1087538 has 4 divisors (see below), whose sum is σ = 1631310. Its totient is φ = 543768.

The previous prime is 1087519. The next prime is 1087543. The reversal of 1087538 is 8357801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8357801 = 199 ⋅41999.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 20449 = 1033^2 + 143^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271883 + ... + 271886.

2^1087538 is an apocalyptic number.

1087538 is a deficient number, since it is larger than the sum of its proper divisors (543772).

1087538 is an equidigital number, since it uses as much as digits as its factorization.

1087538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543771.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1087538 is about 1042.8509001770. The cubic root of 1087538 is about 102.8367035739.

The spelling of 1087538 in words is "one million, eighty-seven thousand, five hundred thirty-eight".