1315664 has 40 divisors (see below), whose sum is σ = 3089088. Its totient is φ = 529920.

The previous prime is 1315661. The next prime is 1315673. The reversal of 1315664 is 4665131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559 + ... + 2249.

2^1315664 is an apocalyptic number.

1315664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1315664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544544).

1315664 is an abundant number, since it is smaller than the sum of its proper divisors (1773424).

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

1315664 is a wasteful number, since it uses less digits than its factorization.

1315664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1315664 is about 1147.0239753379. The cubic root of 1315664 is about 109.5758875686.

The spelling of 1315664 in words is "one million, three hundred fifteen thousand, six hundred sixty-four".