142105 has 8 divisors (see below), whose sum is σ = 172872. Its totient is φ = 112128.

The previous prime is 142099. The next prime is 142111. The reversal of 142105 is 501241.

It is an interprime number because it is at equal distance from previous prime (142099) and next prime (142111).

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 100489 = 204^2 + 317^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 142105 - 2³ = 142097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (21609).

2¹⁴²¹⁰⁵ is an apocalyptic number.

It is an amenable number.

142105 is a deficient number, since it is larger than the sum of its proper divisors (30767).

142105 is an equidigital number, since it uses as much as digits as its factorization.

142105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 142105 is about 376.9681684174. The cubic root of 142105 is about 52.1838903524.

Adding to 142105 its reverse (501241), we get a palindrome (643346).

The spelling of 142105 in words is "one hundred forty-two thousand, one hundred five".