142440520 has 32 divisors (see below), whose sum is σ = 324888120. Its totient is φ = 56194560.

The previous prime is 142440517. The next prime is 142440527. The reversal of 142440520 is 25044241.

It is a happy number.

142440520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 79174404 + 63266116 = 8898^2 + 7954^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142440491 and 142440500.

It is not an unprimeable number, because it can be changed into a prime (142440527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21471 + ... + 27310.

Almost surely, 2^142440520 is an apocalyptic number.

142440520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142440520 is an abundant number, since it is smaller than the sum of its proper divisors (182447600).

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

142440520 is a wasteful number, since it uses less digits than its factorization.

142440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48865 (or 48861 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 142440520 is about 11934.8447832387. The cubic root of 142440520 is about 522.2492802907.

Adding to 142440520 its reverse (25044241), we get a palindrome (167484761).

The spelling of 142440520 in words is "one hundred forty-two million, four hundred forty thousand, five hundred twenty".