1803413 has 4 divisors (see below), whose sum is σ = 1809420. Its totient is φ = 1797408.

The previous prime is 1803383. The next prime is 1803419. The reversal of 1803413 is 3143081.

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: 3143081 = 859 ⋅3659.

It can be written as a sum of positive squares in 2 ways, for example, as 925444 + 877969 = 962^2 + 937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1803413 - 2⁶ = 1803349 is a prime.

It is a deceptive number, since it divides R_1803412.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803419) 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, 2528 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (452355).

2^1803413 is an apocalyptic number.

It is an amenable number.

1803413 is a deficient number, since it is larger than the sum of its proper divisors (6007).

1803413 is an equidigital number, since it uses as much as digits as its factorization.

1803413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1803413 is about 1342.9121341324. The cubic root of 1803413 is about 121.7208749079.

Adding to 1803413 its reverse (3143081), we get a palindrome (4946494).

The spelling of 1803413 in words is "one million, eight hundred three thousand, four hundred thirteen".