123409259 has 4 divisors (see below), whose sum is σ = 123456120. Its totient is φ = 123362400.

The previous prime is 123409229. The next prime is 123409267. The reversal of 123409259 is 952904321.

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

It is a cyclic number.

It is not a de Polignac number, because 123409259 - 2⁸ = 123409003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123409219) 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, 19229 + ... + 24830.

It is an arithmetic number, because the mean of its divisors is an integer number (30864030).

Almost surely, 2^123409259 is an apocalyptic number.

123409259 is a deficient number, since it is larger than the sum of its proper divisors (46861).

123409259 is an equidigital number, since it uses as much as digits as its factorization.

123409259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46860.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 123409259 is about 11108.9720046456. The cubic root of 123409259 is about 497.8699506654.

The spelling of 123409259 in words is "one hundred twenty-three million, four hundred nine thousand, two hundred fifty-nine".