123381205 has 4 divisors (see below), whose sum is σ = 148057452. Its totient is φ = 98704960.

The previous prime is 123381161. The next prime is 123381211. The reversal of 123381205 is 502183321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502183321 = 53 ⋅9475157.

It can be written as a sum of positive squares in 2 ways, for example, as 76143076 + 47238129 = 8726^2 + 6873^2 .

It is not a de Polignac number, because 123381205 - 2¹⁷ = 123250133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123381205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12338116 + ... + 12338125.

It is an arithmetic number, because the mean of its divisors is an integer number (37014363).

Almost surely, 2^123381205 is an apocalyptic number.

It is an amenable number.

123381205 is a deficient number, since it is larger than the sum of its proper divisors (24676247).

123381205 is an equidigital number, since it uses as much as digits as its factorization.

123381205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24676246.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 123381205 is about 11107.7092597889. The cubic root of 123381205 is about 497.8322217240.

The spelling of 123381205 in words is "one hundred twenty-three million, three hundred eighty-one thousand, two hundred five".