142263305 has 4 divisors (see below), whose sum is σ = 170715972. Its totient is φ = 113810640.

The previous prime is 142263301. The next prime is 142263323. The reversal of 142263305 is 503362241.

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 67059721 + 75203584 = 8189^2 + 8672^2 .

It is not a de Polignac number, because 142263305 - 2² = 142263301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142263301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14226326 + ... + 14226335.

It is an arithmetic number, because the mean of its divisors is an integer number (42678993).

Almost surely, 2^142263305 is an apocalyptic number.

It is an amenable number.

142263305 is a deficient number, since it is larger than the sum of its proper divisors (28452667).

142263305 is an equidigital number, since it uses as much as digits as its factorization.

142263305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28452666.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 142263305 is about 11927.4182034504. The cubic root of 142263305 is about 522.0326078288.

The spelling of 142263305 in words is "one hundred forty-two million, two hundred sixty-three thousand, three hundred five".