1801725 has 12 divisors (see below), whose sum is σ = 2978976. Its totient is φ = 960880.

The previous prime is 1801717. The next prime is 1801727. The reversal of 1801725 is 5271081.

It is not a de Polignac number, because 1801725 - 2³ = 1801717 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1801695 and 1801704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11937 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (248248).

2^1801725 is an apocalyptic number.

1801725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1801725 is a deficient number, since it is larger than the sum of its proper divisors (1177251).

1801725 is a wasteful number, since it uses less digits than its factorization.

1801725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24036 (or 24031 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1801725 is about 1342.2835020963. The cubic root of 1801725 is about 121.6828860177.

The spelling of 1801725 in words is "one million, eight hundred one thousand, seven hundred twenty-five".