123556542 has 32 divisors (see below), whose sum is σ = 254858400. Its totient is φ = 39904128.

The previous prime is 123556523. The next prime is 123556549. The reversal of 123556542 is 245655321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123556549) 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 15 ways as a sum of consecutive naturals, for example, 58684 + ... + 60752.

It is an arithmetic number, because the mean of its divisors is an integer number (7964325).

Almost surely, 2^123556542 is an apocalyptic number.

123556542 is an abundant number, since it is smaller than the sum of its proper divisors (131301858).

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

123556542 is a wasteful number, since it uses less digits than its factorization.

123556542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380.

The product of its digits is 36000, while the sum is 33.

The square root of 123556542 is about 11115.5990391881. The cubic root of 123556542 is about 498.0679331852.

The spelling of 123556542 in words is "one hundred twenty-three million, five hundred fifty-six thousand, five hundred forty-two".