142225547 has 2 divisors, whose sum is σ = 142225548. Its totient is φ = 142225546.

The previous prime is 142225513. The next prime is 142225561. The reversal of 142225547 is 745522241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142225547 - 2¹⁸ = 141963403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142225147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71112773 + 71112774.

It is an arithmetic number, because the mean of its divisors is an integer number (71112774).

Almost surely, 2^142225547 is an apocalyptic number.

142225547 is a deficient number, since it is larger than the sum of its proper divisors (1).

142225547 is an equidigital number, since it uses as much as digits as its factorization.

142225547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 32.

The square root of 142225547 is about 11925.8352747302. The cubic root of 142225547 is about 521.9864196444.

Adding to 142225547 its reverse (745522241), we get a palindrome (887747788).

The spelling of 142225547 in words is "one hundred forty-two million, two hundred twenty-five thousand, five hundred forty-seven".