142202120 has 16 divisors (see below), whose sum is σ = 319954860. Its totient is φ = 56880832.

The previous prime is 142202117. The next prime is 142202129. The reversal of 142202120 is 21202241.

It can be written as a sum of positive squares in 2 ways, for example, as 140517316 + 1684804 = 11854^2 + 1298^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142202095 and 142202104.

It is not an unprimeable number, because it can be changed into a prime (142202129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777487 + ... + 1777566.

Almost surely, 2^142202120 is an apocalyptic number.

142202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142202120 is an abundant number, since it is smaller than the sum of its proper divisors (177752740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142202120 is a wasteful number, since it uses less digits than its factorization.

142202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555064 (or 3555060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 142202120 is about 11924.8530389267. The cubic root of 142202120 is about 521.9577580160.

Adding to 142202120 its reverse (21202241), we get a palindrome (163404361).

The spelling of 142202120 in words is "one hundred forty-two million, two hundred two thousand, one hundred twenty".