• 142 can be written using four 4's:

142 has 4 divisors (see below), whose sum is σ = 216. Its totient is φ = 70.

The previous prime is 139. The next prime is 149. The reversal of 142 is 241.

142 is nontrivially palindromic in base 3 and base 7.

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

142 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

142 is an undulating number in base 7.

It is a plaindrome in base 9, base 11, base 13 and base 16.

It is a nialpdrome in base 12, base 14 and base 15.

It is a congruent number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34 + ... + 37.

It is an arithmetic number, because the mean of its divisors is an integer number (54).

142 is a deficient number, since it is larger than the sum of its proper divisors (74).

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

142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73.

The product of its digits is 8, while the sum is 7.

The square root of 142 is about 11.9163752878. The cubic root of 142 is about 5.2171034463.

Adding to 142 its reverse (241), we get a palindrome (383).

Subtracting 142 from its reverse (241), we obtain a palindrome (99).

It can be divided in two parts, 14 and 2, that multiplied together give a triangular number (28 = T_{7}).

The spelling of 142 in words is "one hundred forty-two", and thus it is an aban number and an iban number.

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