142686240 has 48 divisors (see below), whose sum is σ = 449463168. Its totient is φ = 38049536.

The previous prime is 142686239. The next prime is 142686241. The reversal of 142686240 is 42686241.

It is an interprime number because it is at equal distance from previous prime (142686239) and next prime (142686241).

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (142686241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148152 + ... + 149111.

It is an arithmetic number, because the mean of its divisors is an integer number (9363816).

Almost surely, 2^142686240 is an apocalyptic number.

142686240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142686240 is an abundant number, since it is smaller than the sum of its proper divisors (306776928).

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

142686240 is a wasteful number, since it uses less digits than its factorization.

142686240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297281 (or 297273 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 142686240 is about 11945.1345743780. The cubic root of 142686240 is about 522.5494134567.

Subtracting from 142686240 its reverse (42686241), we obtain a palindrome (99999999).

The spelling of 142686240 in words is "one hundred forty-two million, six hundred eighty-six thousand, two hundred forty".