1260664 has 16 divisors (see below), whose sum is σ = 2428200. Its totient is φ = 613152.

The previous prime is 1260661. The next prime is 1260673. The reversal of 1260664 is 4660621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834 + ... + 2425.

2^1260664 is an apocalyptic number.

It is an amenable number.

1260664 is a deficient number, since it is larger than the sum of its proper divisors (1167536).

1260664 is a wasteful number, since it uses less digits than its factorization.

1260664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302 (or 4298 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1260664 is about 1122.7929461838. The cubic root of 1260664 is about 108.0271993679.

The spelling of 1260664 in words is "one million, two hundred sixty thousand, six hundred sixty-four".