1618216 has 8 divisors (see below), whose sum is σ = 3034170. Its totient is φ = 809104.

The previous prime is 1618207. The next prime is 1618217. The reversal of 1618216 is 6128161.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 715716 = 950^2 + 846^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1618217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101131 + ... + 101146.

2^1618216 is an apocalyptic number.

It is an amenable number.

1618216 is a deficient number, since it is larger than the sum of its proper divisors (1415954).

1618216 is a wasteful number, since it uses less digits than its factorization.

1618216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202283 (or 202279 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 1618216 is about 1272.0911916997. The cubic root of 1618216 is about 117.4029015242.

The spelling of 1618216 in words is "one million, six hundred eighteen thousand, two hundred sixteen".