12123655 has 8 divisors (see below), whose sum is σ = 14582592. Its totient is φ = 9676128.

The previous prime is 12123649. The next prime is 12123673. The reversal of 12123655 is 55632121.

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 12123655 - 2³ = 12123647 is a prime.

It is a Duffinian number.

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, 304 + ... + 4933.

It is an arithmetic number, because the mean of its divisors is an integer number (1822824).

Almost surely, 2^12123655 is an apocalyptic number.

12123655 is a deficient number, since it is larger than the sum of its proper divisors (2458937).

12123655 is an equidigital number, since it uses as much as digits as its factorization.

12123655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705.

The product of its digits is 1800, while the sum is 25.

The square root of 12123655 is about 3481.9039331952. The cubic root of 12123655 is about 229.7265496259.

Adding to 12123655 its reverse (55632121), we get a palindrome (67755776).

The spelling of 12123655 in words is "twelve million, one hundred twenty-three thousand, six hundred fifty-five".