12155655 has 8 divisors (see below), whose sum is σ = 19449072. Its totient is φ = 6483008.

The previous prime is 12155641. The next prime is 12155677. The reversal of 12155655 is 55655121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12155655 - 2¹³ = 12147463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405174 + ... + 405203.

It is an arithmetic number, because the mean of its divisors is an integer number (2431134).

Almost surely, 2^12155655 is an apocalyptic number.

12155655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12155655 is a deficient number, since it is larger than the sum of its proper divisors (7293417).

12155655 is an equidigital number, since it uses as much as digits as its factorization.

12155655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810385.

The product of its digits is 7500, while the sum is 30.

The square root of 12155655 is about 3486.4960920672. The cubic root of 12155655 is about 229.9284906868.

The spelling of 12155655 in words is "twelve million, one hundred fifty-five thousand, six hundred fifty-five".