123543607421 has 8 divisors (see below), whose sum is σ = 133135035264. Its totient is φ = 113964761520.

The previous prime is 123543607403. The next prime is 123543607423. The reversal of 123543607421 is 124706345321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123543607421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543607423) 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, 3125081 + ... + 3164366.

It is an arithmetic number, because the mean of its divisors is an integer number (16641879408).

Almost surely, 2^123543607421 is an apocalyptic number.

It is an amenable number.

123543607421 is a deficient number, since it is larger than the sum of its proper divisors (9591427843).

123543607421 is a wasteful number, since it uses less digits than its factorization.

123543607421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290971.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 123543607421 in words is "one hundred twenty-three billion, five hundred forty-three million, six hundred seven thousand, four hundred twenty-one".