123426560 has 72 divisors (see below), whose sum is σ = 297696336. Its totient is φ = 49029120.

The previous prime is 123426557. The next prime is 123426571. The reversal of 123426560 is 65624321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269852 + ... + 270308.

Almost surely, 2^123426560 is an apocalyptic number.

123426560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123426560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148848168).

123426560 is an abundant number, since it is smaller than the sum of its proper divisors (174269776).

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

123426560 is an equidigital number, since it uses as much as digits as its factorization.

123426560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 675 counting only the distinct ones).

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

The square root of 123426560 is about 11109.7506722698. The cubic root of 123426560 is about 497.8932153852.

The spelling of 123426560 in words is "one hundred twenty-three million, four hundred twenty-six thousand, five hundred sixty".