123457312421 has 8 divisors (see below), whose sum is σ = 123682104000. Its totient is φ = 123232586400.

The previous prime is 123457312393. The next prime is 123457312487. The reversal of 123457312421 is 124213754321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123457312421 - 2³⁰ = 122383570597 is a prime.

It is a super-3 number, since 3×123457312421³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123457312721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5264480 + ... + 5287878.

It is an arithmetic number, because the mean of its divisors is an integer number (15460263000).

Almost surely, 2^123457312421 is an apocalyptic number.

It is an amenable number.

123457312421 is a deficient number, since it is larger than the sum of its proper divisors (224791579).

123457312421 is an equidigital number, since it uses as much as digits as its factorization.

123457312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32779.

The product of its digits is 40320, while the sum is 35.

The spelling of 123457312421 in words is "one hundred twenty-three billion, four hundred fifty-seven million, three hundred twelve thousand, four hundred twenty-one".