142223447 has 2 divisors, whose sum is σ = 142223448. Its totient is φ = 142223446.

The previous prime is 142223413. The next prime is 142223461. The reversal of 142223447 is 744322241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142223447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142223407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71111723 + 71111724.

It is an arithmetic number, because the mean of its divisors is an integer number (71111724).

Almost surely, 2^142223447 is an apocalyptic number.

142223447 is a deficient number, since it is larger than the sum of its proper divisors (1).

142223447 is an equidigital number, since it uses as much as digits as its factorization.

142223447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 29.

The square root of 142223447 is about 11925.7472302577. The cubic root of 142223447 is about 521.9838505400.

Adding to 142223447 its reverse (744322241), we get a palindrome (886545688).

The spelling of 142223447 in words is "one hundred forty-two million, two hundred twenty-three thousand, four hundred forty-seven".