1356664 has 8 divisors (see below), whose sum is σ = 2543760. Its totient is φ = 678328.

The previous prime is 1356659. The next prime is 1356671. The reversal of 1356664 is 4666531.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 84784 + ... + 84799.

It is an arithmetic number, because the mean of its divisors is an integer number (317970).

2^1356664 is an apocalyptic number.

It is an amenable number.

1356664 is a deficient number, since it is larger than the sum of its proper divisors (1187096).

1356664 is a wasteful number, since it uses less digits than its factorization.

1356664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169589 (or 169585 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1356664 is about 1164.7592025822. The cubic root of 1356664 is about 110.7025012580.

The spelling of 1356664 in words is "one million, three hundred fifty-six thousand, six hundred sixty-four".