1801023 has 16 divisors (see below), whose sum is σ = 2768640. Its totient is φ = 1020096.

The previous prime is 1801021. The next prime is 1801039. The reversal of 1801023 is 3201081.

It is a happy number.

It is not a de Polignac number, because 1801023 - 2¹ = 1801021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1800993 and 1801011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2611 + ... + 3227.

It is an arithmetic number, because the mean of its divisors is an integer number (173040).

2^1801023 is an apocalyptic number.

1801023 is a deficient number, since it is larger than the sum of its proper divisors (967617).

1801023 is a wasteful number, since it uses less digits than its factorization.

1801023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1801023 is about 1342.0219819362. The cubic root of 1801023 is about 121.6670803347.

The spelling of 1801023 in words is "one million, eight hundred one thousand, twenty-three".