142502240 has 48 divisors (see below), whose sum is σ = 339791760. Its totient is φ = 56471040.

The previous prime is 142502237. The next prime is 142502249. The reversal of 142502240 is 42205241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142502249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13355 + ... + 21525.

It is an arithmetic number, because the mean of its divisors is an integer number (7078995).

Almost surely, 2^142502240 is an apocalyptic number.

142502240 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 142502240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169895880).

142502240 is an abundant number, since it is smaller than the sum of its proper divisors (197289520).

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

142502240 is a wasteful number, since it uses less digits than its factorization.

142502240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295 (or 8287 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 142502240 is about 11937.4302092201. The cubic root of 142502240 is about 522.3247002417.

Adding to 142502240 its reverse (42205241), we get a palindrome (184707481).

The spelling of 142502240 in words is "one hundred forty-two million, five hundred two thousand, two hundred forty".