1645316 has 12 divisors (see below), whose sum is σ = 2957388. Its totient is φ = 800352.

The previous prime is 1645291. The next prime is 1645327. The reversal of 1645316 is 6135461.

It can be written as a sum of positive squares in 2 ways, for example, as 828100 + 817216 = 910^2 + 904^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5411 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (246449).

2^1645316 is an apocalyptic number.

It is an amenable number.

1645316 is a deficient number, since it is larger than the sum of its proper divisors (1312072).

1645316 is a wasteful number, since it uses less digits than its factorization.

1645316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11158 (or 11156 counting only the distinct ones).

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

The square root of 1645316 is about 1282.6987175483. The cubic root of 1645316 is about 118.0546524580.

The spelling of 1645316 in words is "one million, six hundred forty-five thousand, three hundred sixteen".