1645264 has 10 divisors (see below), whose sum is σ = 3187730. Its totient is φ = 822624.

The previous prime is 1645253. The next prime is 1645291. The reversal of 1645264 is 4625461.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 478864 = 1080^2 + 692^2 .

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51399 + ... + 51430.

It is an arithmetic number, because the mean of its divisors is an integer number (318773).

2^1645264 is an apocalyptic number.

It is an amenable number.

1645264 is a deficient number, since it is larger than the sum of its proper divisors (1542466).

1645264 is a wasteful number, since it uses less digits than its factorization.

1645264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102837 (or 102831 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 1645264 is about 1282.6784476243. The cubic root of 1645264 is about 118.0534087442.

The spelling of 1645264 in words is "one million, six hundred forty-five thousand, two hundred sixty-four".