1803722 has 4 divisors (see below), whose sum is σ = 2705586. Its totient is φ = 901860.

The previous prime is 1803701. The next prime is 1803743. The reversal of 1803722 is 2273081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2273081 = 41 ⋅55441.

It is an interprime number because it is at equal distance from previous prime (1803701) and next prime (1803743).

It can be written as a sum of positive squares in only one way, i.e., 1079521 + 724201 = 1039^2 + 851^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450929 + ... + 450932.

2^1803722 is an apocalyptic number.

1803722 is a deficient number, since it is larger than the sum of its proper divisors (901864).

1803722 is an equidigital number, since it uses as much as digits as its factorization.

1803722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901863.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1803722 is about 1343.0271776848. The cubic root of 1803722 is about 121.7278264682.

The spelling of 1803722 in words is "one million, eight hundred three thousand, seven hundred twenty-two".