1672225 has 6 divisors (see below), whose sum is σ = 2073590. Its totient is φ = 1337760.

The previous prime is 1672219. The next prime is 1672243. The reversal of 1672225 is 5222761.

It can be written as a sum of positive squares in 3 ways, for example, as 74529 + 1597696 = 273^2 + 1264^2 .

It is not a de Polignac number, because 1672225 - 2⁹ = 1671713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 66889 = 1672225 / (1 + 6 + 7 + 2 + 2 + 2 + 5).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33420 + ... + 33469.

2^1672225 is an apocalyptic number.

It is an amenable number.

1672225 is a deficient number, since it is larger than the sum of its proper divisors (401365).

1672225 is an equidigital number, since it uses as much as digits as its factorization.

1672225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66899 (or 66894 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 1672225 is about 1293.1453901244. The cubic root of 1672225 is about 118.6947665574.

Adding to 1672225 its reverse (5222761), we get a palindrome (6894986).

The spelling of 1672225 in words is "one million, six hundred seventy-two thousand, two hundred twenty-five".