1209025 has 12 divisors (see below), whose sum is σ = 1514412. Its totient is φ = 957440.

The previous prime is 1209017. The next prime is 1209029. The reversal of 1209025 is 5209021.

It can be written as a sum of positive squares in 6 ways, for example, as 25281 + 1183744 = 159^2 + 1088^2 .

It is not a de Polignac number, because 1209025 - 2³ = 1209017 is a prime.

It is a Duffinian number.

1209025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1208993 and 1209011.

It is not an unprimeable number, because it can be changed into a prime (1209029) 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, 3249 + ... + 3601.

It is an arithmetic number, because the mean of its divisors is an integer number (126201).

2^1209025 is an apocalyptic number.

It is an amenable number.

1209025 is a deficient number, since it is larger than the sum of its proper divisors (305387).

1209025 is a wasteful number, since it uses less digits than its factorization.

1209025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1209025 is about 1099.5567288685. The cubic root of 1209025 is about 106.5315944379.

The spelling of 1209025 in words is "one million, two hundred nine thousand, twenty-five".