1801123 has 4 divisors (see below), whose sum is σ = 1849840. Its totient is φ = 1752408.

The previous prime is 1801117. The next prime is 1801187. The reversal of 1801123 is 3211081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3211081 = 179 ⋅17939.

It is a cyclic number.

It is not a de Polignac number, because 1801123 - 2⁵ = 1801091 is a prime.

It is a super-2 number, since 2×1801123² = 6488088122258, which contains 22 as substring.

It is a Duffinian number.

1801123 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1801097 and 1801106.

It is not an unprimeable number, because it can be changed into a prime (1801223) 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, 24303 + ... + 24376.

It is an arithmetic number, because the mean of its divisors is an integer number (462460).

2^1801123 is an apocalyptic number.

1801123 is a deficient number, since it is larger than the sum of its proper divisors (48717).

1801123 is an equidigital number, since it uses as much as digits as its factorization.

1801123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48716.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1801123 is about 1342.0592386329. The cubic root of 1801123 is about 121.6693321073.

The spelling of 1801123 in words is "one million, eight hundred one thousand, one hundred twenty-three".