142722155 has 8 divisors (see below), whose sum is σ = 171709200. Its totient is φ = 113882656.

The previous prime is 142722143. The next prime is 142722187. The reversal of 142722155 is 551227241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142722155 - 2⁸ = 142721899 is a prime.

It is a super-2 number, since 2×142722155² = 40739227055688050, which contains 22 as substring.

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, 34745 + ... + 38634.

It is an arithmetic number, because the mean of its divisors is an integer number (21463650).

Almost surely, 2^142722155 is an apocalyptic number.

142722155 is a deficient number, since it is larger than the sum of its proper divisors (28987045).

142722155 is an equidigital number, since it uses as much as digits as its factorization.

142722155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73773.

The product of its digits is 5600, while the sum is 29.

The square root of 142722155 is about 11946.6378115351. The cubic root of 142722155 is about 522.5932527407.

Adding to 142722155 its reverse (551227241), we get a palindrome (693949396).

The spelling of 142722155 in words is "one hundred forty-two million, seven hundred twenty-two thousand, one hundred fifty-five".