1081618 has 4 divisors (see below), whose sum is σ = 1622430. Its totient is φ = 540808.

The previous prime is 1081583. The next prime is 1081631. The reversal of 1081618 is 8161801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8161801 = 1009 ⋅8089.

It can be written as a sum of positive squares in only one way, i.e., 786769 + 294849 = 887^2 + 543^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1081592 and 1081601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270403 + ... + 270406.

2^1081618 is an apocalyptic number.

1081618 is a deficient number, since it is larger than the sum of its proper divisors (540812).

1081618 is an equidigital number, since it uses as much as digits as its factorization.

1081618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540811.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1081618 is about 1040.0086538101. The cubic root of 1081618 is about 102.6497671815.

The spelling of 1081618 in words is "one million, eighty-one thousand, six hundred eighteen".