1209668 has 6 divisors (see below), whose sum is σ = 2116926. Its totient is φ = 604832.

The previous prime is 1209647. The next prime is 1209671. The reversal of 1209668 is 8669021.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 123904 = 1042^2 + 352^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151205 + ... + 151212.

It is an arithmetic number, because the mean of its divisors is an integer number (352821).

2^1209668 is an apocalyptic number.

It is an amenable number.

1209668 is a deficient number, since it is larger than the sum of its proper divisors (907258).

1209668 is a wasteful number, since it uses less digits than its factorization.

1209668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302421 (or 302419 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1209668 is about 1099.8490805561. The cubic root of 1209668 is about 106.5504767812.

The spelling of 1209668 in words is "one million, two hundred nine thousand, six hundred sixty-eight".