13123555 has 4 divisors (see below), whose sum is σ = 15748272. Its totient is φ = 10498840.

The previous prime is 13123531. The next prime is 13123577. The reversal of 13123555 is 55532131.

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

It is not a de Polignac number, because 13123555 - 2¹³ = 13115363 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, 1312351 + ... + 1312360.

It is an arithmetic number, because the mean of its divisors is an integer number (3937068).

Almost surely, 2^13123555 is an apocalyptic number.

13123555 is a deficient number, since it is larger than the sum of its proper divisors (2624717).

13123555 is an equidigital number, since it uses as much as digits as its factorization.

13123555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624716.

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

The square root of 13123555 is about 3622.6447521114. The cubic root of 13123555 is about 235.8760421041.

Adding to 13123555 its reverse (55532131), we get a palindrome (68655686).

The spelling of 13123555 in words is "thirteen million, one hundred twenty-three thousand, five hundred fifty-five".