1851223 has 4 divisors (see below), whose sum is σ = 2019528. Its totient is φ = 1682920.

The previous prime is 1851217. The next prime is 1851253. The reversal of 1851223 is 3221581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1851223 - 2¹⁷ = 1720151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1851194 and 1851203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851203) 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, 84136 + ... + 84157.

It is an arithmetic number, because the mean of its divisors is an integer number (504882).

2^1851223 is an apocalyptic number.

1851223 is a deficient number, since it is larger than the sum of its proper divisors (168305).

1851223 is a wasteful number, since it uses less digits than its factorization.

1851223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168304.

The product of its digits is 480, while the sum is 22.

The square root of 1851223 is about 1360.5965603367. The cubic root of 1851223 is about 122.7871481208.

The spelling of 1851223 in words is "one million, eight hundred fifty-one thousand, two hundred twenty-three".