1813241 has 4 divisors (see below), whose sum is σ = 1817232. Its totient is φ = 1809252.

The previous prime is 1813223. The next prime is 1813277. The reversal of 1813241 is 1423181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1813241 - 2⁶ = 1813177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813211) 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, 1211 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (454308).

2^1813241 is an apocalyptic number.

It is an amenable number.

1813241 is a deficient number, since it is larger than the sum of its proper divisors (3991).

1813241 is an equidigital number, since it uses as much as digits as its factorization.

1813241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990.

The product of its digits is 192, while the sum is 20.

The square root of 1813241 is about 1346.5663741532. The cubic root of 1813241 is about 121.9415871940.

The spelling of 1813241 in words is "one million, eight hundred thirteen thousand, two hundred forty-one".