142145240 has 64 divisors (see below), whose sum is σ = 332791200. Its totient is φ = 54577152.

The previous prime is 142145239. The next prime is 142145287. The reversal of 142145240 is 42541241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328064 + ... + 328496.

Almost surely, 2^142145240 is an apocalyptic number.

142145240 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 142145240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166395600).

142145240 is an abundant number, since it is smaller than the sum of its proper divisors (190645960).

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

142145240 is a wasteful number, since it uses less digits than its factorization.

142145240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 142145240 is about 11922.4678653373. The cubic root of 142145240 is about 521.8881554048. Note that the first 3 decimals are identical.

Adding to 142145240 its reverse (42541241), we get a palindrome (184686481).

The spelling of 142145240 in words is "one hundred forty-two million, one hundred forty-five thousand, two hundred forty".