1801946 has 4 divisors (see below), whose sum is σ = 2702922. Its totient is φ = 900972.

The previous prime is 1801931. The next prime is 1801967. The reversal of 1801946 is 6491081.

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

It can be written as a sum of positive squares in only one way, i.e., 1792921 + 9025 = 1339^2 + 95^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450485 + ... + 450488.

2^1801946 is an apocalyptic number.

1801946 is a deficient number, since it is larger than the sum of its proper divisors (900976).

1801946 is an equidigital number, since it uses as much as digits as its factorization.

1801946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900975.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1801946 is about 1342.3658219725. The cubic root of 1801946 is about 121.6878610311.

The spelling of 1801946 in words is "one million, eight hundred one thousand, nine hundred forty-six".