123543542 has 16 divisors (see below), whose sum is σ = 189665280. Its totient is φ = 60327528.

The previous prime is 123543533. The next prime is 123543547. The reversal of 123543542 is 245345321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543547) 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, 54059 + ... + 56297.

It is an arithmetic number, because the mean of its divisors is an integer number (11854080).

Almost surely, 2^123543542 is an apocalyptic number.

123543542 is a deficient number, since it is larger than the sum of its proper divisors (66121738).

123543542 is a wasteful number, since it uses less digits than its factorization.

123543542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its digits is 14400, while the sum is 29.

The square root of 123543542 is about 11115.0142599998. The cubic root of 123543542 is about 498.0504645021.

Adding to 123543542 its reverse (245345321), we get a palindrome (368888863).

The spelling of 123543542 in words is "one hundred twenty-three million, five hundred forty-three thousand, five hundred forty-two".