123929542 has 8 divisors (see below), whose sum is σ = 202793832. Its totient is φ = 56331600.

The previous prime is 123929489. The next prime is 123929549. The reversal of 123929542 is 245929321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123929549) 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 3 ways as a sum of consecutive naturals, for example, 2816559 + ... + 2816602.

It is an arithmetic number, because the mean of its divisors is an integer number (25349229).

Almost surely, 2^123929542 is an apocalyptic number.

123929542 is a deficient number, since it is larger than the sum of its proper divisors (78864290).

123929542 is a wasteful number, since it uses less digits than its factorization.

123929542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633174.

The product of its digits is 38880, while the sum is 37.

The square root of 123929542 is about 11132.3646185346. The cubic root of 123929542 is about 498.5686289306.

The spelling of 123929542 in words is "one hundred twenty-three million, nine hundred twenty-nine thousand, five hundred forty-two".