6840123 has 4 divisors (see below), whose sum is σ = 9120168. Its totient is φ = 4560080.

The previous prime is 6840109. The next prime is 6840157. The reversal of 6840123 is 3210486.

It is a happy number.

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 6840123 - 2⁵ = 6840091 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6840093 and 6840102.

It is not an unprimeable number, because it can be changed into a prime (6880123) 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, 1140018 + ... + 1140023.

It is an arithmetic number, because the mean of its divisors is an integer number (2280042).

Almost surely, 2^6840123 is an apocalyptic number.

6840123 is a deficient number, since it is larger than the sum of its proper divisors (2280045).

6840123 is a wasteful number, since it uses less digits than its factorization.

6840123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280044.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 6840123 is about 2615.3628811314. The cubic root of 6840123 is about 189.8255369901.

The spelling of 6840123 in words is "six million, eight hundred forty thousand, one hundred twenty-three".