1818941 has 4 divisors (see below), whose sum is σ = 1843932. Its totient is φ = 1793952.

The previous prime is 1818937. The next prime is 1818977. The reversal of 1818941 is 1498181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1498181 = 41 ⋅36541.

It can be written as a sum of positive squares in 2 ways, for example, as 1144900 + 674041 = 1070^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818941 - 2² = 1818937 is a prime.

It is a super-2 number, since 2×1818941² = 6617092722962, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1818898 and 1818907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12386 + ... + 12531.

It is an arithmetic number, because the mean of its divisors is an integer number (460983).

2^1818941 is an apocalyptic number.

It is an amenable number.

1818941 is a deficient number, since it is larger than the sum of its proper divisors (24991).

1818941 is an equidigital number, since it uses as much as digits as its factorization.

1818941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24990.

The product of its digits is 2304, while the sum is 32.

The square root of 1818941 is about 1348.6812076988. The cubic root of 1818941 is about 122.0692297214.

The spelling of 1818941 in words is "one million, eight hundred eighteen thousand, nine hundred forty-one".