618642 has 12 divisors (see below), whose sum is σ = 1340430. Its totient is φ = 206208.

The previous prime is 618637. The next prime is 618643. The reversal of 618642 is 246816.

618642 is a `hidden beast` number, since 6 + 18 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 269361 = 591^2 + 519^2 .

It is not an unprimeable number, because it can be changed into a prime (618643) by changing a digit.

618642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17167 + ... + 17202.

2⁶¹⁸⁶⁴² is an apocalyptic number.

618642 is an abundant number, since it is smaller than the sum of its proper divisors (721788).

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

618642 is a wasteful number, since it uses less digits than its factorization.

618642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34377 (or 34374 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 618642 is about 786.5379838253. The cubic root of 618642 is about 85.2078879161.

The spelling of 618642 in words is "six hundred eighteen thousand, six hundred forty-two".