140021312 has 14 divisors (see below), whose sum is σ = 277854918. Its totient is φ = 70010624.

The previous prime is 140021311. The next prime is 140021341. The reversal of 140021312 is 213120041.

It can be written as a sum of positive squares in only one way, i.e., 110166016 + 29855296 = 10496^2 + 5464^2 .

It is not an unprimeable number, because it can be changed into a prime (140021311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093853 + ... + 1093980.

Almost surely, 2^140021312 is an apocalyptic number.

It is an amenable number.

140021312 is a deficient number, since it is larger than the sum of its proper divisors (137833606).

140021312 is an equidigital number, since it uses as much as digits as its factorization.

140021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187845 (or 2187835 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 140021312 is about 11833.0601283016. The cubic root of 140021312 is about 519.2757570469.

Adding to 140021312 its reverse (213120041), we get a palindrome (353141353).

The spelling of 140021312 in words is "one hundred forty million, twenty-one thousand, three hundred twelve".