123254129 has 4 divisors (see below), whose sum is σ = 123289584. Its totient is φ = 123218676.

The previous prime is 123254123. The next prime is 123254137. The reversal of 123254129 is 921452321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123254129 - 2⁴ = 123254113 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123254123) 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, 11867 + ... + 19680.

It is an arithmetic number, because the mean of its divisors is an integer number (30822396).

Almost surely, 2^123254129 is an apocalyptic number.

It is an amenable number.

123254129 is a deficient number, since it is larger than the sum of its proper divisors (35455).

123254129 is an equidigital number, since it uses as much as digits as its factorization.

123254129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35454.

The product of its digits is 4320, while the sum is 29.

The square root of 123254129 is about 11101.9876148373. The cubic root of 123254129 is about 497.6612495492.

The spelling of 123254129 in words is "one hundred twenty-three million, two hundred fifty-four thousand, one hundred twenty-nine".