1209144 has 32 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 397536.

The previous prime is 1209139. The next prime is 1209151. The reversal of 1209144 is 4419021.

It is a self number, because there is not a number n which added to its sum of digits gives 1209144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689 + ... + 2295.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2^1209144 is an apocalyptic number.

It is an amenable number.

1209144 is an abundant number, since it is smaller than the sum of its proper divisors (1855176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209144 is a wasteful number, since it uses less digits than its factorization.

1209144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1209144 is about 1099.6108402521. The cubic root of 1209144 is about 106.5350894977.

The spelling of 1209144 in words is "one million, two hundred nine thousand, one hundred forty-four".