123240533 has 16 divisors (see below), whose sum is σ = 136152576. Its totient is φ = 110841600.

The previous prime is 123240527. The next prime is 123240539. The reversal of 123240533 is 335042321.

It is an interprime number because it is at equal distance from previous prime (123240527) and next prime (123240539).

It is a cyclic number.

It is not a de Polignac number, because 123240533 - 2¹⁰ = 123239509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123240499 and 123240508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244760 + ... + 245262.

It is an arithmetic number, because the mean of its divisors is an integer number (8509536).

Almost surely, 2^123240533 is an apocalyptic number.

123240533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123240533 is a deficient number, since it is larger than the sum of its proper divisors (12912043).

123240533 is a wasteful number, since it uses less digits than its factorization.

123240533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 123240533 is about 11101.3752751630. The cubic root of 123240533 is about 497.6429500915.

Adding to 123240533 its reverse (335042321), we get a palindrome (458282854).

The spelling of 123240533 in words is "one hundred twenty-three million, two hundred forty thousand, five hundred thirty-three".