12155045 has 8 divisors (see below), whose sum is σ = 16669824. Its totient is φ = 8334864.

The previous prime is 12155029. The next prime is 12155057. The reversal of 12155045 is 54055121.

It is a happy number.

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 12155045 - 2⁴ = 12155029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12155045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173609 + ... + 173678.

It is an arithmetic number, because the mean of its divisors is an integer number (2083728).

Almost surely, 2^12155045 is an apocalyptic number.

It is an amenable number.

12155045 is a deficient number, since it is larger than the sum of its proper divisors (4514779).

12155045 is an equidigital number, since it uses as much as digits as its factorization.

12155045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347299.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 12155045 is about 3486.4086105906. The cubic root of 12155045 is about 229.9246445009.

The spelling of 12155045 in words is "twelve million, one hundred fifty-five thousand, forty-five".