123601720 has 32 divisors (see below), whose sum is σ = 303387120. Its totient is φ = 44945920.

The previous prime is 123601711. The next prime is 123601721. The reversal of 123601720 is 27106321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 123601691 and 123601700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123601721) by changing a digit.

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, 140017 + ... + 140896.

Almost surely, 2^123601720 is an apocalyptic number.

123601720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123601720 is an abundant number, since it is smaller than the sum of its proper divisors (179785400).

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

123601720 is a wasteful number, since it uses less digits than its factorization.

123601720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280935 (or 280931 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 123601720 is about 11117.6310426277. The cubic root of 123601720 is about 498.1286313636.

The spelling of 123601720 in words is "one hundred twenty-three million, six hundred one thousand, seven hundred twenty".