1670225 has 6 divisors (see below), whose sum is σ = 2071110. Its totient is φ = 1336160.

The previous prime is 1670213. The next prime is 1670269. The reversal of 1670225 is 5220761.

It can be written as a sum of positive squares in 3 ways, for example, as 961 + 1669264 = 31^2 + 1292^2 .

It is not a de Polignac number, because 1670225 - 2⁶ = 1670161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1670225.

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 in 5 ways as a sum of consecutive naturals, for example, 33380 + ... + 33429.

It is an arithmetic number, because the mean of its divisors is an integer number (345185).

2^1670225 is an apocalyptic number.

It is an amenable number.

1670225 is a deficient number, since it is larger than the sum of its proper divisors (400885).

1670225 is an equidigital number, since it uses as much as digits as its factorization.

1670225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66819 (or 66814 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1670225 is about 1292.3718505136. The cubic root of 1670225 is about 118.6474275856.

Adding to 1670225 its reverse (5220761), we get a palindrome (6890986).

It can be divided in two parts, 16 and 70225, that multiplied together give a square (1123600 = 1060²).

The spelling of 1670225 in words is "one million, six hundred seventy thousand, two hundred twenty-five".