123506542 has 8 divisors (see below), whose sum is σ = 191236032. Its totient is φ = 59761200.

The previous prime is 123506533. The next prime is 123506549. The reversal of 123506542 is 245605321.

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

It is a self number, because there is not a number n which added to its sum of digits gives 123506542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123506549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995959 + ... + 996082.

It is an arithmetic number, because the mean of its divisors is an integer number (23904504).

Almost surely, 2^123506542 is an apocalyptic number.

123506542 is a deficient number, since it is larger than the sum of its proper divisors (67729490).

123506542 is a wasteful number, since it uses less digits than its factorization.

123506542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992074.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 123506542 is about 11113.3497200439. The cubic root of 123506542 is about 498.0007392343. Note that the first 3 decimals are identical.

The spelling of 123506542 in words is "one hundred twenty-three million, five hundred six thousand, five hundred forty-two".