12155315 has 4 divisors (see below), whose sum is σ = 14586384. Its totient is φ = 9724248.

The previous prime is 12155291. The next prime is 12155347. The reversal of 12155315 is 51355121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51355121 = 3581 ⋅14341.

It is a cyclic number.

It is not a de Polignac number, because 12155315 - 2¹⁰ = 12154291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215527 + ... + 1215536.

It is an arithmetic number, because the mean of its divisors is an integer number (3646596).

Almost surely, 2^12155315 is an apocalyptic number.

12155315 is a deficient number, since it is larger than the sum of its proper divisors (2431069).

12155315 is an equidigital number, since it uses as much as digits as its factorization.

12155315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431068.

The product of its digits is 750, while the sum is 23.

The square root of 12155315 is about 3486.4473321707. The cubic root of 12155315 is about 229.9263469269.

The spelling of 12155315 in words is "twelve million, one hundred fifty-five thousand, three hundred fifteen".