123103555 has 4 divisors (see below), whose sum is σ = 147724272. Its totient is φ = 98482840.

The previous prime is 123103537. The next prime is 123103583. The reversal of 123103555 is 555301321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123103555 - 2⁷ = 123103427 is a prime.

It is a Duffinian 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, 12310351 + ... + 12310360.

It is an arithmetic number, because the mean of its divisors is an integer number (36931068).

Almost surely, 2^123103555 is an apocalyptic number.

123103555 is a deficient number, since it is larger than the sum of its proper divisors (24620717).

123103555 is an equidigital number, since it uses as much as digits as its factorization.

123103555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24620716.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 123103555 is about 11095.2041441336. The cubic root of 123103555 is about 497.4585102139.

Adding to 123103555 its reverse (555301321), we get a palindrome (678404876).

The spelling of 123103555 in words is "one hundred twenty-three million, one hundred three thousand, five hundred fifty-five".