1801242 has 12 divisors (see below), whose sum is σ = 3902730. Its totient is φ = 600408.

The previous prime is 1801237. The next prime is 1801259. The reversal of 1801242 is 2421081.

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 549081 = 1119^2 + 741^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 100069 = 1801242 / (1 + 8 + 0 + 1 + 2 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50017 + ... + 50052.

2^1801242 is an apocalyptic number.

1801242 is an abundant number, since it is smaller than the sum of its proper divisors (2101488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1801242 is a wasteful number, since it uses less digits than its factorization.

1801242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100077 (or 100074 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1801242 is about 1342.1035727544. The cubic root of 1801242 is about 121.6720116081.

The spelling of 1801242 in words is "one million, eight hundred one thousand, two hundred forty-two".