123664542 has 8 divisors (see below), whose sum is σ = 247329096. Its totient is φ = 41221512.

The previous prime is 123664523. The next prime is 123664561. The reversal of 123664542 is 245466321.

It is an interprime number because it is at equal distance from previous prime (123664523) and next prime (123664561).

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

123664542 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10305373 + ... + 10305384.

It is an arithmetic number, because the mean of its divisors is an integer number (30916137).

Almost surely, 2^123664542 is an apocalyptic number.

123664542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123664542 is a wasteful number, since it uses less digits than its factorization.

123664542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20610762.

The product of its digits is 34560, while the sum is 33.

The square root of 123664542 is about 11120.4560158296. The cubic root of 123664542 is about 498.2130102774.

The spelling of 123664542 in words is "one hundred twenty-three million, six hundred sixty-four thousand, five hundred forty-two".