123235560 has 128 divisors (see below), whose sum is σ = 469497600. Its totient is φ = 28166400.

The previous prime is 123235559. The next prime is 123235561. The reversal of 123235560 is 65532321.

It is an interprime number because it is at equal distance from previous prime (123235559) and next prime (123235561).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123235561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591 + ... + 15710.

It is an arithmetic number, because the mean of its divisors is an integer number (3667950).

Almost surely, 2^123235560 is an apocalyptic number.

123235560 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 123235560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234748800).

123235560 is an abundant number, since it is smaller than the sum of its proper divisors (346262040).

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

123235560 is a wasteful number, since it uses less digits than its factorization.

123235560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16328 (or 16318 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 123235560 is about 11101.1512916454. The cubic root of 123235560 is about 497.6362563747.

Adding to 123235560 its reverse (65532321), we get a palindrome (188767881).

The spelling of 123235560 in words is "one hundred twenty-three million, two hundred thirty-five thousand, five hundred sixty".