123120534 has 16 divisors (see below), whose sum is σ = 252896688. Its totient is φ = 39930912.

The previous prime is 123120533. The next prime is 123120539. The reversal of 123120534 is 435021321.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123120534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277077 + ... + 277520.

It is an arithmetic number, because the mean of its divisors is an integer number (15806043).

Almost surely, 2^123120534 is an apocalyptic number.

123120534 is an abundant number, since it is smaller than the sum of its proper divisors (129776154).

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

123120534 is a wasteful number, since it uses less digits than its factorization.

123120534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554639.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123120534 is about 11095.9692681622. The cubic root of 123120534 is about 497.4813797396.

Adding to 123120534 its reverse (435021321), we get a palindrome (558141855).

The spelling of 123120534 in words is "one hundred twenty-three million, one hundred twenty thousand, five hundred thirty-four".