142531205 has 4 divisors (see below), whose sum is σ = 171037452. Its totient is φ = 114024960.

The previous prime is 142531199. The next prime is 142531219. The reversal of 142531205 is 502135241.

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 73856836 + 68674369 = 8594^2 + 8287^2 .

It is not a de Polignac number, because 142531205 - 2⁴ = 142531189 is a prime.

It is a Duffinian 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, 14253116 + ... + 14253125.

It is an arithmetic number, because the mean of its divisors is an integer number (42759363).

Almost surely, 2^142531205 is an apocalyptic number.

It is an amenable number.

142531205 is a deficient number, since it is larger than the sum of its proper divisors (28506247).

142531205 is an equidigital number, since it uses as much as digits as its factorization.

142531205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28506246.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 142531205 is about 11938.6433483876. The cubic root of 142531205 is about 522.3600870773.

Adding to 142531205 its reverse (502135241), we get a palindrome (644666446).

The spelling of 142531205 in words is "one hundred forty-two million, five hundred thirty-one thousand, two hundred five".