142640346 has 16 divisors (see below), whose sum is σ = 288892800. Its totient is φ = 46944768.

The previous prime is 142640341. The next prime is 142640359. The reversal of 142640346 is 643046241.

It is not an unprimeable number, because it can be changed into a prime (142640341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149991 + ... + 150938.

It is an arithmetic number, because the mean of its divisors is an integer number (18055800).

Almost surely, 2^142640346 is an apocalyptic number.

142640346 is an abundant number, since it is smaller than the sum of its proper divisors (146252454).

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

142640346 is a wasteful number, since it uses less digits than its factorization.

142640346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301013.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 142640346 is about 11943.2133866895. The cubic root of 142640346 is about 522.4933826989.

Adding to 142640346 its reverse (643046241), we get a palindrome (785686587).

The spelling of 142640346 in words is "one hundred forty-two million, six hundred forty thousand, three hundred forty-six".