142045 has 4 divisors (see below), whose sum is σ = 170460. Its totient is φ = 113632.

The previous prime is 142039. The next prime is 142049. The reversal of 142045 is 540241.

142045 = 266² + 267².

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

It can be written as a sum of positive squares in 2 ways, for example, as 71289 + 70756 = 267^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 142045 - 2⁷ = 141917 is a prime.

142045 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14200 + ... + 14209.

It is an arithmetic number, because the mean of its divisors is an integer number (42615).

2¹⁴²⁰⁴⁵ is an apocalyptic number.

142045 is the 267-th centered square number.

It is an amenable number.

142045 is a deficient number, since it is larger than the sum of its proper divisors (28415).

142045 is an equidigital number, since it uses as much as digits as its factorization.

142045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28414.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 142045 is about 376.8885776990. Note that the first 3 decimals coincide. The cubic root of 142045 is about 52.1765449055.

Adding to 142045 its reverse (540241), we get a palindrome (682286).

The spelling of 142045 in words is "one hundred forty-two thousand, forty-five".