142522505 has 4 divisors (see below), whose sum is σ = 171027012. Its totient is φ = 114018000.

The previous prime is 142522451. The next prime is 142522507. The reversal of 142522505 is 505225241.

142522505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 78570496 + 63952009 = 8864^2 + 7997^2 .

It is not a de Polignac number, because 142522505 - 2¹⁰ = 142521481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142522507) 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, 14252246 + ... + 14252255.

It is an arithmetic number, because the mean of its divisors is an integer number (42756753).

Almost surely, 2^142522505 is an apocalyptic number.

It is an amenable number.

142522505 is a deficient number, since it is larger than the sum of its proper divisors (28504507).

142522505 is an equidigital number, since it uses as much as digits as its factorization.

142522505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28504506.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 142522505 is about 11938.2789798195. The cubic root of 142522505 is about 522.3494587024.

Adding to 142522505 its reverse (505225241), we get a palindrome (647747746).

The spelling of 142522505 in words is "one hundred forty-two million, five hundred twenty-two thousand, five hundred five".