123652129 has 4 divisors (see below), whose sum is σ = 123725700. Its totient is φ = 123578560.

The previous prime is 123652103. The next prime is 123652157. The reversal of 123652129 is 921256321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113742225 + 9909904 = 10665^2 + 3148^2 .

It is a cyclic number.

It is not a de Polignac number, because 123652129 - 2⁵ = 123652097 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123652129.

It is not an unprimeable number, because it can be changed into a prime (123652229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34204 + ... + 37645.

It is an arithmetic number, because the mean of its divisors is an integer number (30931425).

Almost surely, 2^123652129 is an apocalyptic number.

It is an amenable number.

123652129 is a deficient number, since it is larger than the sum of its proper divisors (73571).

123652129 is an equidigital number, since it uses as much as digits as its factorization.

123652129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73570.

The product of its digits is 6480, while the sum is 31.

The square root of 123652129 is about 11119.8978862218. The cubic root of 123652129 is about 498.1963401122.

The spelling of 123652129 in words is "one hundred twenty-three million, six hundred fifty-two thousand, one hundred twenty-nine".