12155117 has 8 divisors (see below), whose sum is σ = 13779360. Its totient is φ = 10629360.

The previous prime is 12155081. The next prime is 12155123. The reversal of 12155117 is 71155121.

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

It is not a de Polignac number, because 12155117 - 2¹² = 12151021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12155092 and 12155101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24359 + ... + 24852.

It is an arithmetic number, because the mean of its divisors is an integer number (1722420).

Almost surely, 2^12155117 is an apocalyptic number.

It is an amenable number.

12155117 is a deficient number, since it is larger than the sum of its proper divisors (1624243).

12155117 is a wasteful number, since it uses less digits than its factorization.

12155117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49243.

The product of its digits is 350, while the sum is 23.

The square root of 12155117 is about 3486.4189363873. The cubic root of 12155117 is about 229.9250984837.

The spelling of 12155117 in words is "twelve million, one hundred fifty-five thousand, one hundred seventeen".