163642 has 8 divisors (see below), whose sum is σ = 259956. Its totient is φ = 76992.

The previous prime is 163637. The next prime is 163643. The reversal of 163642 is 246361.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 12321 = 389^2 + 111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (163643) by changing a digit.

163642 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 3 ways as a sum of consecutive naturals, for example, 2373 + ... + 2440.

2¹⁶³⁶⁴² is an apocalyptic number.

163642 is a deficient number, since it is larger than the sum of its proper divisors (96314).

163642 is a wasteful number, since it uses less digits than its factorization.

163642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832.

The product of its digits is 864, while the sum is 22.

The square root of 163642 is about 404.5268841499. The cubic root of 163642 is about 54.6971787495.

The spelling of 163642 in words is "one hundred sixty-three thousand, six hundred forty-two".