166042 has 8 divisors (see below), whose sum is σ = 253332. Its totient is φ = 81600.

The previous prime is 166031. The next prime is 166043. The reversal of 166042 is 240661.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 35721 = 361^2 + 189^2 .

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

It is a super-3 number, since 3×166042³ = 13733306803638264, which contains 333 as substring.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (166043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559 + ... + 802.

2¹⁶⁶⁰⁴² is an apocalyptic number.

166042 is a deficient number, since it is larger than the sum of its proper divisors (87290).

166042 is a wasteful number, since it uses less digits than its factorization.

166042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 166042 is about 407.4825149623. The cubic root of 166042 is about 54.9632812767.

The spelling of 166042 in words is "one hundred sixty-six thousand, forty-two".