1018481 has 4 divisors (see below), whose sum is σ = 1043364. Its totient is φ = 993600.

The previous prime is 1018477. The next prime is 1018489. The reversal of 1018481 is 1848101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1848101 = 263 ⋅7027.

It can be written as a sum of positive squares in 2 ways, for example, as 58081 + 960400 = 241^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018481 - 2² = 1018477 is a prime.

It is a super-2 number, since 2×1018481² = 2074607094722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1018489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12380 + ... + 12461.

It is an arithmetic number, because the mean of its divisors is an integer number (260841).

2^1018481 is an apocalyptic number.

It is an amenable number.

1018481 is a deficient number, since it is larger than the sum of its proper divisors (24883).

1018481 is an equidigital number, since it uses as much as digits as its factorization.

1018481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24882.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1018481 is about 1009.1981965897. The cubic root of 1018481 is about 100.6122768528.

The spelling of 1018481 in words is "one million, eighteen thousand, four hundred eighty-one".