140305242 has 32 divisors (see below), whose sum is σ = 349853184. Its totient is φ = 36442800.

The previous prime is 140305237. The next prime is 140305247. The reversal of 140305242 is 242503041.

140305242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140305237) and next prime (140305247).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (140305247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151384 + ... + 152307.

It is an arithmetic number, because the mean of its divisors is an integer number (10932912).

Almost surely, 2^140305242 is an apocalyptic number.

140305242 is an abundant number, since it is smaller than the sum of its proper divisors (209547942).

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

140305242 is a wasteful number, since it uses less digits than its factorization.

140305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303714.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 140305242 is about 11845.0513717755. The cubic root of 140305242 is about 519.6265094176.

Adding to 140305242 its reverse (242503041), we get a palindrome (382808283).

The spelling of 140305242 in words is "one hundred forty million, three hundred five thousand, two hundred forty-two".