1229664 has 24 divisors (see below), whose sum is σ = 3228120. Its totient is φ = 409856.

The previous prime is 1229663. The next prime is 1229689. The reversal of 1229664 is 4669221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6309 + ... + 6500.

It is an arithmetic number, because the mean of its divisors is an integer number (134505).

2^1229664 is an apocalyptic number.

It is an amenable number.

1229664 is an abundant number, since it is smaller than the sum of its proper divisors (1998456).

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

1229664 is a wasteful number, since it uses less digits than its factorization.

1229664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12822 (or 12814 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 1229664 is about 1108.9021597959. The cubic root of 1229664 is about 107.1343698674.

The spelling of 1229664 in words is "one million, two hundred twenty-nine thousand, six hundred sixty-four".