142155440 has 80 divisors (see below), whose sum is σ = 381767232. Its totient is φ = 48218112.

The previous prime is 142155427. The next prime is 142155457. The reversal of 142155440 is 44551241.

142155440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 53012 + ... + 55628.

Almost surely, 2^142155440 is an apocalyptic number.

142155440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142155440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190883616).

142155440 is an abundant number, since it is smaller than the sum of its proper divisors (239611792).

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

142155440 is a wasteful number, since it uses less digits than its factorization.

142155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 142155440 is about 11922.8956214504. The cubic root of 142155440 is about 521.9006382518.

The spelling of 142155440 in words is "one hundred forty-two million, one hundred fifty-five thousand, four hundred forty".