1966225 has 6 divisors (see below), whose sum is σ = 2438150. Its totient is φ = 1572960.

The previous prime is 1966219. The next prime is 1966241. The reversal of 1966225 is 5226691.

It can be written as a sum of positive squares in 3 ways, for example, as 28561 + 1937664 = 169^2 + 1392^2 .

It is not a de Polignac number, because 1966225 - 2¹⁵ = 1933457 is a prime.

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, 39300 + ... + 39349.

2^1966225 is an apocalyptic number.

It is an amenable number.

1966225 is a deficient number, since it is larger than the sum of its proper divisors (471925).

1966225 is an equidigital number, since it uses as much as digits as its factorization.

1966225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78659 (or 78654 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 1966225 is about 1402.2214518399. The cubic root of 1966225 is about 125.2788441716.

The spelling of 1966225 in words is "one million, nine hundred sixty-six thousand, two hundred twenty-five".