142620155 has 4 divisors (see below), whose sum is σ = 171144192. Its totient is φ = 114096120.

The previous prime is 142620133. The next prime is 142620161. The reversal of 142620155 is 551026241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142620155 - 2¹⁴ = 142603771 is a prime.

It is a super-2 number, since 2×142620155² = 40681017224448050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 14262011 + ... + 14262020.

It is an arithmetic number, because the mean of its divisors is an integer number (42786048).

Almost surely, 2^142620155 is an apocalyptic number.

142620155 is a deficient number, since it is larger than the sum of its proper divisors (28524037).

142620155 is an equidigital number, since it uses as much as digits as its factorization.

142620155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28524036.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 142620155 is about 11942.3680650029. The cubic root of 142620155 is about 522.4687282399.

Adding to 142620155 its reverse (551026241), we get a palindrome (693646396).

The spelling of 142620155 in words is "one hundred forty-two million, six hundred twenty thousand, one hundred fifty-five".