142120520 has 32 divisors (see below), whose sum is σ = 323076600. Its totient is φ = 56260608.

The previous prime is 142120483. The next prime is 142120541. The reversal of 142120520 is 25021241.

It can be written as a sum of positive squares in 4 ways, for example, as 135536164 + 6584356 = 11642^2 + 2566^2 .

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, 14435 + ... + 22194.

Almost surely, 2^142120520 is an apocalyptic number.

142120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142120520 is an abundant number, since it is smaller than the sum of its proper divisors (180956080).

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

142120520 is a wasteful number, since it uses less digits than its factorization.

142120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36737 (or 36733 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 142120520 is about 11921.4311221430. The cubic root of 142120520 is about 521.8579003804.

Adding to 142120520 its reverse (25021241), we get a palindrome (167141761).

The spelling of 142120520 in words is "one hundred forty-two million, one hundred twenty thousand, five hundred twenty".