1345664 has 16 divisors (see below), whose sum is σ = 2681070. Its totient is φ = 672768.

The previous prime is 1345651. The next prime is 1345667. The reversal of 1345664 is 4665431.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 64 = 1160^2 + 8^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5129 + ... + 5384.

2^1345664 is an apocalyptic number.

It is an amenable number.

1345664 is a deficient number, since it is larger than the sum of its proper divisors (1335406).

1345664 is an equidigital number, since it uses as much as digits as its factorization.

1345664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10527 (or 10515 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1345664 is about 1160.0275858789. The cubic root of 1345664 is about 110.4024924173.

It can be divided in two parts, 13456 and 64, that multiplied together give a square (861184 = 928²).

The spelling of 1345664 in words is "one million, three hundred forty-five thousand, six hundred sixty-four".