140656123 has 4 divisors (see below), whose sum is σ = 141519208. Its totient is φ = 139793040.

The previous prime is 140656121. The next prime is 140656163. The reversal of 140656123 is 321656041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140656123 - 2¹ = 140656121 is a prime.

It is a super-2 number, since 2×140656123² = 39568289874782258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140656091 and 140656100.

It is not an unprimeable number, because it can be changed into a prime (140656121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431298 + ... + 431623.

It is an arithmetic number, because the mean of its divisors is an integer number (35379802).

Almost surely, 2^140656123 is an apocalyptic number.

140656123 is a deficient number, since it is larger than the sum of its proper divisors (863085).

140656123 is an equidigital number, since it uses as much as digits as its factorization.

140656123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863084.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 140656123 is about 11859.8534139339. The cubic root of 140656123 is about 520.0593164584.

The spelling of 140656123 in words is "one hundred forty million, six hundred fifty-six thousand, one hundred twenty-three".