142240032 has 144 divisors (see below), whose sum is σ = 449336160. Its totient is φ = 42316800.

The previous prime is 142240009. The next prime is 142240039. The reversal of 142240032 is 230042241.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×142240032² = 40464453406722048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 142239987 and 142240014.

It is not an unprimeable number, because it can be changed into a prime (142240039) 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 23 ways as a sum of consecutive naturals, for example, 186532 + ... + 187292.

It is an arithmetic number, because the mean of its divisors is an integer number (3120390).

Almost surely, 2^142240032 is an apocalyptic number.

142240032 is a gapful number since it is divisible by the number (12) 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 142240032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224668080).

142240032 is an abundant number, since it is smaller than the sum of its proper divisors (307096128).

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

142240032 is a wasteful number, since it uses less digits than its factorization.

142240032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 142240032 is about 11926.4425542573. The cubic root of 142240032 is about 522.0041396598.

Adding to 142240032 its reverse (230042241), we get a palindrome (372282273).

The spelling of 142240032 in words is "one hundred forty-two million, two hundred forty thousand, thirty-two".