140421256 has 16 divisors (see below), whose sum is σ = 274737600. Its totient is φ = 67157904.

The previous prime is 140421217. The next prime is 140421283. The reversal of 140421256 is 652124041.

It is a happy number.

It is a super-3 number, since 3×140421256³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140421256.

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, 381396 + ... + 381763.

It is an arithmetic number, because the mean of its divisors is an integer number (17171100).

Almost surely, 2^140421256 is an apocalyptic number.

It is an amenable number.

140421256 is a deficient number, since it is larger than the sum of its proper divisors (134316344).

140421256 is a wasteful number, since it uses less digits than its factorization.

140421256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763188 (or 763184 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 140421256 is about 11849.9475104323. The cubic root of 140421256 is about 519.7696909101.

Adding to 140421256 its reverse (652124041), we get a palindrome (792545297).

The spelling of 140421256 in words is "one hundred forty million, four hundred twenty-one thousand, two hundred fifty-six".