142144447 has 2 divisors, whose sum is σ = 142144448. Its totient is φ = 142144446.

The previous prime is 142144441. The next prime is 142144459. The reversal of 142144447 is 744441241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142144447 - 2²⁷ = 7926719 is a prime.

It is equal to p_8026348 and since 142144447 and 8026348 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142144441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71072223 + 71072224.

It is an arithmetic number, because the mean of its divisors is an integer number (71072224).

Almost surely, 2^142144447 is an apocalyptic number.

142144447 is a deficient number, since it is larger than the sum of its proper divisors (1).

142144447 is an equidigital number, since it uses as much as digits as its factorization.

142144447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 31.

The square root of 142144447 is about 11922.4346087534. The cubic root of 142144447 is about 521.8871848996.

Adding to 142144447 its reverse (744441241), we get a palindrome (886585688).

The spelling of 142144447 in words is "one hundred forty-two million, one hundred forty-four thousand, four hundred forty-seven".