123056560 has 40 divisors (see below), whose sum is σ = 312118416. Its totient is φ = 44747520.

The previous prime is 123056543. The next prime is 123056569. The reversal of 123056560 is 65650321.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (123056569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69039 + ... + 70798.

Almost surely, 2^123056560 is an apocalyptic number.

123056560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123056560 is an abundant number, since it is smaller than the sum of its proper divisors (189061856).

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

123056560 is a wasteful number, since it uses less digits than its factorization.

123056560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139861 (or 139855 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 123056560 is about 11093.0861350663. The cubic root of 123056560 is about 497.3952002681.

The spelling of 123056560 in words is "one hundred twenty-three million, fifty-six thousand, five hundred sixty".