123306140 has 12 divisors (see below), whose sum is σ = 258942936. Its totient is φ = 49322448.

The previous prime is 123306121. The next prime is 123306179. The reversal of 123306140 is 41603321.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6165307 = 123306140 / (1 + 2 + 3 + 3 + 0 + 6 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082634 + ... + 3082673.

It is an arithmetic number, because the mean of its divisors is an integer number (21578578).

Almost surely, 2^123306140 is an apocalyptic number.

123306140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123306140 is an abundant number, since it is smaller than the sum of its proper divisors (135636796).

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

123306140 is a wasteful number, since it uses less digits than its factorization.

123306140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165316 (or 6165314 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 123306140 is about 11104.3297861690. The cubic root of 123306140 is about 497.7312410361.

Adding to 123306140 its reverse (41603321), we get a palindrome (164909461).

The spelling of 123306140 in words is "one hundred twenty-three million, three hundred six thousand, one hundred forty".