1669025 has 12 divisors (see below), whose sum is σ = 2093244. Its totient is φ = 1320000.

The previous prime is 1668983. The next prime is 1669027. The reversal of 1669025 is 5209661.

It can be written as a sum of positive squares in 6 ways, for example, as 153664 + 1515361 = 392^2 + 1231^2 .

It is not a de Polignac number, because 1669025 - 2¹⁰ = 1668001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1669027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2195 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (174437).

2^1669025 is an apocalyptic number.

It is an amenable number.

1669025 is a deficient number, since it is larger than the sum of its proper divisors (424219).

1669025 is a wasteful number, since it uses less digits than its factorization.

1669025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1669025 is about 1291.9075044290. The cubic root of 1669025 is about 118.6190060607.

The spelling of 1669025 in words is "one million, six hundred sixty-nine thousand, twenty-five".