123204405 has 8 divisors (see below), whose sum is σ = 197127072. Its totient is φ = 65709008.

The previous prime is 123204397. The next prime is 123204439. The reversal of 123204405 is 504402321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123204405 - 2³ = 123204397 is a prime.

It is a super-2 number, since 2×123204405² = 30358650822808050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4106799 + ... + 4106828.

It is an arithmetic number, because the mean of its divisors is an integer number (24640884).

Almost surely, 2^123204405 is an apocalyptic number.

123204405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123204405 is a deficient number, since it is larger than the sum of its proper divisors (73922667).

123204405 is an equidigital number, since it uses as much as digits as its factorization.

123204405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213635.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 123204405 is about 11099.7479701118. The cubic root of 123204405 is about 497.5943172779.

Adding to 123204405 its reverse (504402321), we get a palindrome (627606726).

The spelling of 123204405 in words is "one hundred twenty-three million, two hundred four thousand, four hundred five".