123506547 has 16 divisors (see below), whose sum is σ = 175543200. Its totient is φ = 76969472.

The previous prime is 123506533. The next prime is 123506549. The reversal of 123506547 is 745605321.

It is not a de Polignac number, because 123506547 - 2⁷ = 123506419 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 528 + ... + 15725.

It is an arithmetic number, because the mean of its divisors is an integer number (10971450).

Almost surely, 2^123506547 is an apocalyptic number.

123506547 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123506547 is a deficient number, since it is larger than the sum of its proper divisors (52036653).

123506547 is a wasteful number, since it uses less digits than its factorization.

123506547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16422.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 123506547 is about 11113.3499449986. The cubic root of 123506547 is about 498.0007459546. Note that the first 3 decimals are identical.

The spelling of 123506547 in words is "one hundred twenty-three million, five hundred six thousand, five hundred forty-seven".