142681205 has 4 divisors (see below), whose sum is σ = 171217452. Its totient is φ = 114144960.

The previous prime is 142681193. The next prime is 142681219. The reversal of 142681205 is 502186241.

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 29343889 + 113337316 = 5417^2 + 10646^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142681205 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, 14268116 + ... + 14268125.

It is an arithmetic number, because the mean of its divisors is an integer number (42804363).

Almost surely, 2^142681205 is an apocalyptic number.

It is an amenable number.

142681205 is a deficient number, since it is larger than the sum of its proper divisors (28536247).

142681205 is an equidigital number, since it uses as much as digits as its factorization.

142681205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28536246.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 142681205 is about 11944.9238172539. The cubic root of 142681205 is about 522.5432669466.

The spelling of 142681205 in words is "one hundred forty-two million, six hundred eighty-one thousand, two hundred five".