140445442 has 8 divisors (see below), whose sum is σ = 214643196. Its totient is φ = 68897712.

The previous prime is 140445433. The next prime is 140445457. The reversal of 140445442 is 244544041.

It can be written as a sum of positive squares in 2 ways, for example, as 126540001 + 13905441 = 11249^2 + 3729^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 140445442.

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, 662373 + ... + 662584.

Almost surely, 2^140445442 is an apocalyptic number.

140445442 is a deficient number, since it is larger than the sum of its proper divisors (74197754).

140445442 is a wasteful number, since it uses less digits than its factorization.

140445442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325012.

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 140445442 is about 11850.9679773426. The cubic root of 140445442 is about 519.7995307136.

Adding to 140445442 its reverse (244544041), we get a palindrome (384989483).

The spelling of 140445442 in words is "one hundred forty million, four hundred forty-five thousand, four hundred forty-two".