1813249 has 4 divisors (see below), whose sum is σ = 1816020. Its totient is φ = 1810480.

The previous prime is 1813223. The next prime is 1813277. The reversal of 1813249 is 9423181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 748225 + 1065024 = 865^2 + 1032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813249 - 2⁷ = 1813121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813219) 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, 207 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (454005).

2^1813249 is an apocalyptic number.

It is an amenable number.

1813249 is a deficient number, since it is larger than the sum of its proper divisors (2771).

1813249 is a wasteful number, since it uses less digits than its factorization.

1813249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its digits is 1728, while the sum is 28.

The square root of 1813249 is about 1346.5693446681. The cubic root of 1813249 is about 121.9417665287.

It can be divided in two parts, 18132 and 49, that added together give a palindrome (18181).

The spelling of 1813249 in words is "one million, eight hundred thirteen thousand, two hundred forty-nine".