140656 has 20 divisors (see below), whose sum is σ = 279000. Its totient is φ = 68672.

The previous prime is 140639. The next prime is 140659. The reversal of 140656 is 656041.

It is a super-2 number, since 2×140656² = 39568220672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140659) by changing a digit.

140656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (13950).

2¹⁴⁰⁶⁵⁶ is an apocalyptic number.

140656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

140656 is a deficient number, since it is larger than the sum of its proper divisors (138344).

140656 is a wasteful number, since it uses less digits than its factorization.

140656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 140656 is about 375.0413310557. The cubic root of 140656 is about 52.0059164866.

Adding to 140656 its product of nonzero digits (720), we get a square (141376 = 376²).

Adding to 140656 its reverse (656041), we get a palindrome (796697).

The spelling of 140656 in words is "one hundred forty thousand, six hundred fifty-six".