123020534 has 32 divisors (see below), whose sum is σ = 240480576. Its totient is φ = 45803520.

The previous prime is 123020533. The next prime is 123020539. The reversal of 123020534 is 435020321.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16787 + ... + 22974.

It is an arithmetic number, because the mean of its divisors is an integer number (7515018).

Almost surely, 2^123020534 is an apocalyptic number.

123020534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123020534 is a deficient number, since it is larger than the sum of its proper divisors (117460042).

123020534 is a wasteful number, since it uses less digits than its factorization.

123020534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39800.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 123020534 is about 11091.4622119899. The cubic root of 123020534 is about 497.3466564428.

Adding to 123020534 its reverse (435020321), we get a palindrome (558040855).

The spelling of 123020534 in words is "one hundred twenty-three million, twenty thousand, five hundred thirty-four".