123355 has 4 divisors (see below), whose sum is σ = 148032. Its totient is φ = 98680.

The previous prime is 123341. The next prime is 123373. The reversal of 123355 is 553321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553321 = 257 ⋅2153.

It is not a de Polignac number, because 123355 - 2⁵ = 123323 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12331 + ... + 12340.

It is an arithmetic number, because the mean of its divisors is an integer number (37008).

2¹²³³⁵⁵ is an apocalyptic number.

123355 is a deficient number, since it is larger than the sum of its proper divisors (24677).

123355 is an equidigital number, since it uses as much as digits as its factorization.

123355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24676.

The product of its digits is 450, while the sum is 19.

The square root of 123355 is about 351.2193047086. The cubic root of 123355 is about 49.7796974278.

Adding to 123355 its reverse (553321), we get a palindrome (676676).

The spelling of 123355 in words is "one hundred twenty-three thousand, three hundred fifty-five".