123015200242405 has 4 divisors (see below), whose sum is σ = 147618240290892. Its totient is φ = 98412160193920.

The previous prime is 123015200242397. The next prime is 123015200242421. The reversal of 123015200242405 is 504242002510321.

It is a happy number.

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 87286379627524 + 35728820614881 = 9342718^2 + 5977359^2 .

It is not a de Polignac number, because 123015200242405 - 2³ = 123015200242397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12301520024236 + ... + 12301520024245.

It is an arithmetic number, because the mean of its divisors is an integer number (36904560072723).

Almost surely, 2^{123015200242405} is an apocalyptic number.

It is an amenable number.

123015200242405 is a deficient number, since it is larger than the sum of its proper divisors (24603040048487).

123015200242405 is an equidigital number, since it uses as much as digits as its factorization.

123015200242405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24603040048486.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 123015200242405 its reverse (504242002510321), we get a palindrome (627257202752726).

The spelling of 123015200242405 in words is "one hundred twenty-three trillion, fifteen billion, two hundred million, two hundred forty-two thousand, four hundred five".