142440400120 has 32 divisors (see below), whose sum is σ = 322796602800. Its totient is φ = 56566257408.

The previous prime is 142440400099. The next prime is 142440400121. The reversal of 142440400120 is 21004044241.

It is a junction number, because it is equal to n+sod(n) for n = 142440400091 and 142440400100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142440400121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12803829 + ... + 12814948.

Almost surely, 2^142440400120 is an apocalyptic number.

142440400120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142440400120 is an abundant number, since it is smaller than the sum of its proper divisors (180356202680).

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

142440400120 is a wasteful number, since it uses less digits than its factorization.

142440400120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25618927 (or 25618923 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 142440400120 its reverse (21004044241), we get a palindrome (163444444361).

The spelling of 142440400120 in words is "one hundred forty-two billion, four hundred forty million, four hundred thousand, one hundred twenty".