142506205 has 4 divisors (see below), whose sum is σ = 171007452. Its totient is φ = 114004960.

The previous prime is 142506193. The next prime is 142506233. The reversal of 142506205 is 502605241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502605241 = 3539 ⋅142019.

It can be written as a sum of positive squares in 2 ways, for example, as 47969476 + 94536729 = 6926^2 + 9723^2 .

It is not a de Polignac number, because 142506205 - 2²¹ = 140409053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142506205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14250616 + ... + 14250625.

It is an arithmetic number, because the mean of its divisors is an integer number (42751863).

Almost surely, 2^142506205 is an apocalyptic number.

It is an amenable number.

142506205 is a deficient number, since it is larger than the sum of its proper divisors (28501247).

142506205 is an equidigital number, since it uses as much as digits as its factorization.

142506205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28501246.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 142506205 is about 11937.5962823342. The cubic root of 142506205 is about 522.3295446059.

It can be divided in two parts, 14250620 and 5, that added together give a square (14250625 = 3775²).

The spelling of 142506205 in words is "one hundred forty-two million, five hundred six thousand, two hundred five".