142143245 has 4 divisors (see below), whose sum is σ = 170571900. Its totient is φ = 113714592.

The previous prime is 142143241. The next prime is 142143263. The reversal of 142143245 is 542341241.

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 30228004 + 111915241 = 5498^2 + 10579^2 .

It is a cyclic number.

It is not a de Polignac number, because 142143245 - 2² = 142143241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142143241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14214320 + ... + 14214329.

It is an arithmetic number, because the mean of its divisors is an integer number (42642975).

Almost surely, 2^142143245 is an apocalyptic number.

It is an amenable number.

142143245 is a deficient number, since it is larger than the sum of its proper divisors (28428655).

142143245 is an equidigital number, since it uses as much as digits as its factorization.

142143245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28428654.

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

The square root of 142143245 is about 11922.3841994796. The cubic root of 142143245 is about 521.8857138370.

Adding to 142143245 its reverse (542341241), we get a palindrome (684484486).

The spelling of 142143245 in words is "one hundred forty-two million, one hundred forty-three thousand, two hundred forty-five".