1660225 has 24 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 1110720.

The previous prime is 1660207. The next prime is 1660229. The reversal of 1660225 is 5220661.

It is not a de Polignac number, because 1660225 - 2⁷ = 1660097 is a prime.

1660225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1660196 and 1660205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9186 + ... + 9364.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

2^1660225 is an apocalyptic number.

It is an amenable number.

1660225 is a deficient number, since it is larger than the sum of its proper divisors (750335).

1660225 is a wasteful number, since it uses less digits than its factorization.

1660225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1660225 is about 1288.4971866481. The cubic root of 1660225 is about 118.4101641277.

Adding to 1660225 its reverse (5220661), we get a palindrome (6880886).

The spelling of 1660225 in words is "one million, six hundred sixty thousand, two hundred twenty-five".