123231205 has 4 divisors (see below), whose sum is σ = 147877452. Its totient is φ = 98584960.

The previous prime is 123231203. The next prime is 123231209. The reversal of 123231205 is 502132321.

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 25735329 + 97495876 = 5073^2 + 9874^2 .

It is not a de Polignac number, because 123231205 - 2¹ = 123231203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231203) 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, 12323116 + ... + 12323125.

It is an arithmetic number, because the mean of its divisors is an integer number (36969363).

Almost surely, 2^123231205 is an apocalyptic number.

It is an amenable number.

123231205 is a deficient number, since it is larger than the sum of its proper divisors (24646247).

123231205 is an equidigital number, since it uses as much as digits as its factorization.

123231205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24646246.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 123231205 is about 11100.9551390860. The cubic root of 123231205 is about 497.6303943453.

Adding to 123231205 its reverse (502132321), we get a palindrome (625363526).

The spelling of 123231205 in words is "one hundred twenty-three million, two hundred thirty-one thousand, two hundred five".