169804142 has 4 divisors (see below), whose sum is σ = 254706216. Its totient is φ = 84902070.

The previous prime is 169804123. The next prime is 169804153. The reversal of 169804142 is 241408961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241408961 = 7309 ⋅33029.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42451034 + ... + 42451037.

It is an arithmetic number, because the mean of its divisors is an integer number (63676554).

Almost surely, 2^169804142 is an apocalyptic number.

169804142 is a deficient number, since it is larger than the sum of its proper divisors (84902074).

169804142 is an equidigital number, since it uses as much as digits as its factorization.

169804142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84902073.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 169804142 is about 13030.8918344064. The cubic root of 169804142 is about 553.7530014937.

The spelling of 169804142 in words is "one hundred sixty-nine million, eight hundred four thousand, one hundred forty-two".