1812413 has 4 divisors (see below), whose sum is σ = 1874940. Its totient is φ = 1749888.

The previous prime is 1812409. The next prime is 1812431. The reversal of 1812413 is 3142181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3142181 = 7 ⋅448883.

It can be written as a sum of positive squares in 2 ways, for example, as 806404 + 1006009 = 898^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812413 - 2² = 1812409 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812403) 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, 31220 + ... + 31277.

It is an arithmetic number, because the mean of its divisors is an integer number (468735).

2^1812413 is an apocalyptic number.

It is an amenable number.

1812413 is a deficient number, since it is larger than the sum of its proper divisors (62527).

1812413 is an equidigital number, since it uses as much as digits as its factorization.

1812413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62526.

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

The square root of 1812413 is about 1346.2588904070. The cubic root of 1812413 is about 121.9230231960.

Adding to 1812413 its reverse (3142181), we get a palindrome (4954594).

The spelling of 1812413 in words is "one million, eight hundred twelve thousand, four hundred thirteen".