142561523420 has 24 divisors (see below), whose sum is σ = 309036594048. Its totient is φ = 55185105600.

The previous prime is 142561523411. The next prime is 142561523449. The reversal of 142561523420 is 24325165241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114968351 + ... + 114969590.

It is an arithmetic number, because the mean of its divisors is an integer number (12876524752).

Almost surely, 2^142561523420 is an apocalyptic number.

142561523420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142561523420 is an abundant number, since it is smaller than the sum of its proper divisors (166475070628).

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

142561523420 is a wasteful number, since it uses less digits than its factorization.

142561523420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229937981 (or 229937979 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 142561523420 its reverse (24325165241), we get a palindrome (166886688661).

The spelling of 142561523420 in words is "one hundred forty-two billion, five hundred sixty-one million, five hundred twenty-three thousand, four hundred twenty".