123042656 has 24 divisors (see below), whose sum is σ = 264262824. Its totient is φ = 55928320.

The previous prime is 123042653. The next prime is 123042659. The reversal of 123042656 is 656240321.

It is an interprime number because it is at equal distance from previous prime (123042653) and next prime (123042659).

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042653) 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, 174425 + ... + 175128.

It is an arithmetic number, because the mean of its divisors is an integer number (11010951).

Almost surely, 2^123042656 is an apocalyptic number.

123042656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123042656 is an abundant number, since it is smaller than the sum of its proper divisors (141220168).

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

123042656 is a wasteful number, since it uses less digits than its factorization.

123042656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349574 (or 349566 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 123042656 is about 11092.4594207056. The cubic root of 123042656 is about 497.3764662178.

Adding to 123042656 its reverse (656240321), we get a palindrome (779282977).

The spelling of 123042656 in words is "one hundred twenty-three million, forty-two thousand, six hundred fifty-six".