140215442 has 8 divisors (see below), whose sum is σ = 210418236. Its totient is φ = 70076032.

The previous prime is 140215409. The next prime is 140215477. The reversal of 140215442 is 244512041.

140215442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133656721 + 6558721 = 11561^2 + 2561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9863 + ... + 19434.

Almost surely, 2^140215442 is an apocalyptic number.

140215442 is a deficient number, since it is larger than the sum of its proper divisors (70202794).

140215442 is a wasteful number, since it uses less digits than its factorization.

140215442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31692.

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

The square root of 140215442 is about 11841.2601525344. The cubic root of 140215442 is about 519.5156263682.

Adding to 140215442 its reverse (244512041), we get a palindrome (384727483).

The spelling of 140215442 in words is "one hundred forty million, two hundred fifteen thousand, four hundred forty-two".