142212445 has 4 divisors (see below), whose sum is σ = 170654940. Its totient is φ = 113769952.

The previous prime is 142212443. The next prime is 142212461. The reversal of 142212445 is 544212241.

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 112911876 + 29300569 = 10626^2 + 5413^2 .

It is a cyclic number.

It is not a de Polignac number, because 142212445 - 2¹ = 142212443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142212443) 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, 14221240 + ... + 14221249.

It is an arithmetic number, because the mean of its divisors is an integer number (42663735).

Almost surely, 2^142212445 is an apocalyptic number.

It is an amenable number.

142212445 is a deficient number, since it is larger than the sum of its proper divisors (28442495).

142212445 is an equidigital number, since it uses as much as digits as its factorization.

142212445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28442494.

The product of its digits is 2560, while the sum is 25.

The square root of 142212445 is about 11925.2859504500. The cubic root of 142212445 is about 521.9703904658.

Adding to 142212445 its reverse (544212241), we get a palindrome (686424686).

The spelling of 142212445 in words is "one hundred forty-two million, two hundred twelve thousand, four hundred forty-five".