142420447 has 16 divisors (see below), whose sum is σ = 163416960. Its totient is φ = 123027552.

The previous prime is 142420433. The next prime is 142420451. The reversal of 142420447 is 744024241.

It is a cyclic number.

It is not a de Polignac number, because 142420447 - 2⁷ = 142420319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142420477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17028 + ... + 23974.

It is an arithmetic number, because the mean of its divisors is an integer number (10213560).

Almost surely, 2^142420447 is an apocalyptic number.

142420447 is a deficient number, since it is larger than the sum of its proper divisors (20996513).

142420447 is a wasteful number, since it uses less digits than its factorization.

142420447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062.

The product of its (nonzero) digits is 7168, while the sum is 28.

The square root of 142420447 is about 11934.0038126356. The cubic root of 142420447 is about 522.2247470042.

Adding to 142420447 its reverse (744024241), we get a palindrome (886444688).

The spelling of 142420447 in words is "one hundred forty-two million, four hundred twenty thousand, four hundred forty-seven".