142638 has 8 divisors (see below), whose sum is σ = 285288. Its totient is φ = 47544.

The previous prime is 142619. The next prime is 142657. The reversal of 142638 is 836241.

It is a happy number.

142638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (142619) and next prime (142657).

It is a sphenic number, since it is the product of 3 distinct primes.

142638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11881 + ... + 11892.

It is an arithmetic number, because the mean of its divisors is an integer number (35661).

2¹⁴²⁶³⁸ is an apocalyptic number.

142638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142638 is a wasteful number, since it uses less digits than its factorization.

142638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23778.

The product of its digits is 1152, while the sum is 24.

The square root of 142638 is about 377.6744629969. The cubic root of 142638 is about 52.2490518207.

Adding to 142638 its reverse (836241), we get a palindrome (978879).

It can be divided in two parts, 142 and 638, that added together give a triangular number (780 = T₃₉).

The spelling of 142638 in words is "one hundred forty-two thousand, six hundred thirty-eight".