1813255 has 8 divisors (see below), whose sum is σ = 2192400. Its totient is φ = 1439616.

The previous prime is 1813223. The next prime is 1813277. The reversal of 1813255 is 5523181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1813255 - 2⁵ = 1813223 is a prime.

1813255 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (274050).

2^1813255 is an apocalyptic number.

1813255 is a deficient number, since it is larger than the sum of its proper divisors (379145).

1813255 is a wasteful number, since it uses less digits than its factorization.

1813255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753.

The product of its digits is 1200, while the sum is 25.

The square root of 1813255 is about 1346.5715725501. The cubic root of 1813255 is about 121.9419010294.

It can be divided in two parts, 181 and 3255, that multiplied together give a triangular number (589155 = T₁₀₈₅).

The spelling of 1813255 in words is "one million, eight hundred thirteen thousand, two hundred fifty-five".