142055440 has 40 divisors (see below), whose sum is σ = 331739928. Its totient is φ = 56570880.

The previous prime is 142055411. The next prime is 142055443. The reversal of 142055440 is 44550241.

It is a happy number.

142055440 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 19820304 + 122235136 = 4452^2 + 11056^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (142055443) by changing a digit.

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, 14830 + ... + 22450.

Almost surely, 2^142055440 is an apocalyptic number.

142055440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142055440 is an abundant number, since it is smaller than the sum of its proper divisors (189684488).

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

142055440 is a wasteful number, since it uses less digits than its factorization.

142055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7867 (or 7861 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 142055440 is about 11918.7012715312. The cubic root of 142055440 is about 521.7782316186.

The spelling of 142055440 in words is "one hundred forty-two million, fifty-five thousand, four hundred forty".