142215101 has 24 divisors (see below), whose sum is σ = 175384440. Its totient is φ = 114777600.

The previous prime is 142215083. The next prime is 142215103. The reversal of 142215101 is 101512241.

It can be written as a sum of positive squares in 4 ways, for example, as 1768900 + 140446201 = 1330^2 + 11851^2 .

It is not a de Polignac number, because 142215101 - 2⁶ = 142215037 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142215101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142215103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57041 + ... + 59481.

It is an arithmetic number, because the mean of its divisors is an integer number (7307685).

Almost surely, 2^142215101 is an apocalyptic number.

It is an amenable number.

142215101 is a deficient number, since it is larger than the sum of its proper divisors (33169339).

142215101 is a wasteful number, since it uses less digits than its factorization.

142215101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525 (or 2518 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 142215101 is about 11925.3973099432. The cubic root of 142215101 is about 521.9736399347.

Adding to 142215101 its reverse (101512241), we get a palindrome (243727342).

The spelling of 142215101 in words is "one hundred forty-two million, two hundred fifteen thousand, one hundred one".