168142132 has 6 divisors (see below), whose sum is σ = 294248738. Its totient is φ = 84071064.

The previous prime is 168142081. The next prime is 168142157. The reversal of 168142132 is 231241861.

It can be written as a sum of positive squares in only one way, i.e., 167288356 + 853776 = 12934^2 + 924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 168142132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21017763 + ... + 21017770.

Almost surely, 2^168142132 is an apocalyptic number.

It is an amenable number.

168142132 is a deficient number, since it is larger than the sum of its proper divisors (126106606).

168142132 is a wasteful number, since it uses less digits than its factorization.

168142132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42035537 (or 42035535 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 168142132 is about 12966.9630985825. The cubic root of 168142132 is about 551.9403991170.

Adding to 168142132 its reverse (231241861), we get a palindrome (399383993).

The spelling of 168142132 in words is "one hundred sixty-eight million, one hundred forty-two thousand, one hundred thirty-two".