140005212 has 12 divisors (see below), whose sum is σ = 326678856. Its totient is φ = 46668400.

The previous prime is 140005211. The next prime is 140005223. The reversal of 140005212 is 212500041.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 140005191 and 140005200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140005211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5833539 + ... + 5833562.

It is an arithmetic number, because the mean of its divisors is an integer number (27223238).

Almost surely, 2^140005212 is an apocalyptic number.

140005212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

140005212 is an abundant number, since it is smaller than the sum of its proper divisors (186673644).

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

140005212 is a wasteful number, since it uses less digits than its factorization.

140005212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11667108 (or 11667106 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 140005212 is about 11832.3798113482. The cubic root of 140005212 is about 519.2558537431.

Adding to 140005212 its reverse (212500041), we get a palindrome (352505253).

The spelling of 140005212 in words is "one hundred forty million, five thousand, two hundred twelve".