12155575 has 6 divisors (see below), whose sum is σ = 15072944. Its totient is φ = 9724440.

The previous prime is 12155567. The next prime is 12155579. The reversal of 12155575 is 57555121.

It is not a de Polignac number, because 12155575 - 2³ = 12155567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 243087 + ... + 243136.

Almost surely, 2^12155575 is an apocalyptic number.

12155575 is a deficient number, since it is larger than the sum of its proper divisors (2917369).

12155575 is an equidigital number, since it uses as much as digits as its factorization.

12155575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486233 (or 486228 counting only the distinct ones).

The product of its digits is 8750, while the sum is 31.

The square root of 12155575 is about 3486.4846192117. The cubic root of 12155575 is about 229.9279862763.

It can be divided in two parts, 121 and 55575, that added together give a square (55696 = 236²).

The spelling of 12155575 in words is "twelve million, one hundred fifty-five thousand, five hundred seventy-five".