142681 has 16 divisors (see below), whose sum is σ = 190080. Its totient is φ = 103680.

The previous prime is 142673. The next prime is 142697. The reversal of 142681 is 186241.

142681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 4-Lehmer number, since φ(142681) divides (142681-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 142681 - 2³ = 142673 is a prime.

It is a super-2 number, since 2×142681² = 40715735522, which contains 22 as substring.

142681 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (142601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹⁴²⁶⁸¹ is an apocalyptic number.

142681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142681 is a deficient number, since it is larger than the sum of its proper divisors (47399).

142681 is a wasteful number, since it uses less digits than its factorization.

142681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its digits is 384, while the sum is 22.

The square root of 142681 is about 377.7313860404. The cubic root of 142681 is about 52.2543016688.

The spelling of 142681 in words is "one hundred forty-two thousand, six hundred eighty-one".