142242605 has 4 divisors (see below), whose sum is σ = 170691132. Its totient is φ = 113794080.

The previous prime is 142242599. The next prime is 142242623. The reversal of 142242605 is 506242241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506242241 = 29 ⋅17456629.

It can be written as a sum of positive squares in 2 ways, for example, as 57547396 + 84695209 = 7586^2 + 9203^2 .

It is not a de Polignac number, because 142242605 - 2¹⁴ = 142226221 is a prime.

It is a Duffinian number.

It is a Curzon 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, 14224256 + ... + 14224265.

It is an arithmetic number, because the mean of its divisors is an integer number (42672783).

Almost surely, 2^142242605 is an apocalyptic number.

It is an amenable number.

142242605 is a deficient number, since it is larger than the sum of its proper divisors (28448527).

142242605 is an equidigital number, since it uses as much as digits as its factorization.

142242605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28448526.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 142242605 is about 11926.5504233202. The cubic root of 142242605 is about 522.0072871763.

Adding to 142242605 its reverse (506242241), we get a palindrome (648484846).

The spelling of 142242605 in words is "one hundred forty-two million, two hundred forty-two thousand, six hundred five".