123612560 has 40 divisors (see below), whose sum is σ = 295173816. Its totient is φ = 48107520.

The previous prime is 123612551. The next prime is 123612571. The reversal of 123612560 is 65216321.

It can be written as a sum of positive squares in 4 ways, for example, as 3139984 + 120472576 = 1772^2 + 10976^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17921 + ... + 23840.

Almost surely, 2^123612560 is an apocalyptic number.

123612560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123612560 is an abundant number, since it is smaller than the sum of its proper divisors (171561256).

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

123612560 is a wasteful number, since it uses less digits than its factorization.

123612560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41811 (or 41805 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 123612560 is about 11118.1185458692. The cubic root of 123612560 is about 498.1431930718.

Adding to 123612560 its reverse (65216321), we get a palindrome (188828881).

The spelling of 123612560 in words is "one hundred twenty-three million, six hundred twelve thousand, five hundred sixty".