123042543 has 16 divisors (see below), whose sum is σ = 178431456. Its totient is φ = 74966400.

The previous prime is 123042539. The next prime is 123042547. The reversal of 123042543 is 345240321.

It is an interprime number because it is at equal distance from previous prime (123042539) and next prime (123042547).

It is not a de Polignac number, because 123042543 - 2² = 123042539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042547) 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 15 ways as a sum of consecutive naturals, for example, 11680 + ... + 19557.

It is an arithmetic number, because the mean of its divisors is an integer number (11151966).

Almost surely, 2^123042543 is an apocalyptic number.

123042543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123042543 is a deficient number, since it is larger than the sum of its proper divisors (55388913).

123042543 is a wasteful number, since it uses less digits than its factorization.

123042543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31354.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 123042543 is about 11092.4543271541. The cubic root of 123042543 is about 497.3763139574.

Adding to 123042543 its reverse (345240321), we get a palindrome (468282864).

The spelling of 123042543 in words is "one hundred twenty-three million, forty-two thousand, five hundred forty-three".