123245405 has 8 divisors (see below), whose sum is σ = 150685272. Its totient is φ = 96735808.

The previous prime is 123245401. The next prime is 123245407. The reversal of 123245405 is 504542321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12974404 + 110271001 = 3602^2 + 10501^2 .

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 123245405 - 2² = 123245401 is a prime.

It is a super-2 number, since 2×123245405² = 30378859707228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123245401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232274 + ... + 232803.

It is an arithmetic number, because the mean of its divisors is an integer number (18835659).

Almost surely, 2^123245405 is an apocalyptic number.

It is an amenable number.

123245405 is a deficient number, since it is larger than the sum of its proper divisors (27439867).

123245405 is an equidigital number, since it uses as much as digits as its factorization.

123245405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465135.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 123245405 is about 11101.5947052664. The cubic root of 123245405 is about 497.6495076865.

Adding to 123245405 its reverse (504542321), we get a palindrome (627787726).

It can be divided in two parts, 123245 and 405, that multiplied together give a square (49914225 = 7065²).

The spelling of 123245405 in words is "one hundred twenty-three million, two hundred forty-five thousand, four hundred five".