123505229 has 4 divisors (see below), whose sum is σ = 127764060. Its totient is φ = 119246400.

The previous prime is 123505201. The next prime is 123505247. The reversal of 123505229 is 922505321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922505321 = 23 ⋅40108927.

It can be written as a sum of positive squares in 2 ways, for example, as 25989604 + 97515625 = 5098^2 + 9875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123505229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4258801 = 123505229 / (1 + 2 + 3 + 5 + 0 + 5 + 2 + 2 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123525229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129372 + ... + 2129429.

It is an arithmetic number, because the mean of its divisors is an integer number (31941015).

Almost surely, 2^123505229 is an apocalyptic number.

It is an amenable number.

123505229 is a deficient number, since it is larger than the sum of its proper divisors (4258831).

123505229 is an equidigital number, since it uses as much as digits as its factorization.

123505229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258830.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 123505229 is about 11113.2906467886. The cubic root of 123505229 is about 497.9989744768.

The spelling of 123505229 in words is "one hundred twenty-three million, five hundred five thousand, two hundred twenty-nine".