142664 has 16 divisors (see below), whose sum is σ = 283500. Its totient is φ = 67072.

The previous prime is 142657. The next prime is 142673. The reversal of 142664 is 466241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 20164 = 350^2 + 142^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142664.

It is an unprimeable number.

142664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 389 + ... + 660.

2¹⁴²⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

142664 is a deficient number, since it is larger than the sum of its proper divisors (140836).

142664 is a wasteful number, since it uses less digits than its factorization.

142664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1068 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 142664 is about 377.7088826067. The cubic root of 142664 is about 52.2522262736.

The spelling of 142664 in words is "one hundred forty-two thousand, six hundred sixty-four".