142217546 has 16 divisors (see below), whose sum is σ = 237764160. Its totient is φ = 63403200.

The previous prime is 142217531. The next prime is 142217573. The reversal of 142217546 is 645712241.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109430 + ... + 110721.

It is an arithmetic number, because the mean of its divisors is an integer number (14860260).

Almost surely, 2^142217546 is an apocalyptic number.

142217546 is a deficient number, since it is larger than the sum of its proper divisors (95546614).

142217546 is a wasteful number, since it uses less digits than its factorization.

142217546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220189.

The product of its digits is 13440, while the sum is 32.

The square root of 142217546 is about 11925.4998218104. The cubic root of 142217546 is about 521.9766312209.

Adding to 142217546 its reverse (645712241), we get a palindrome (787929787).

The spelling of 142217546 in words is "one hundred forty-two million, two hundred seventeen thousand, five hundred forty-six".