12155413 has 4 divisors (see below), whose sum is σ = 12326688. Its totient is φ = 11984140.

The previous prime is 12155401. The next prime is 12155419. The reversal of 12155413 is 31455121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12155413 - 2¹³ = 12147221 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155419) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 85531 + ... + 85672.

It is an arithmetic number, because the mean of its divisors is an integer number (3081672).

Almost surely, 2^12155413 is an apocalyptic number.

It is an amenable number.

12155413 is a deficient number, since it is larger than the sum of its proper divisors (171275).

12155413 is an equidigital number, since it uses as much as digits as its factorization.

12155413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171274.

The product of its digits is 600, while the sum is 22.

The square root of 12155413 is about 3486.4613865637. The cubic root of 12155413 is about 229.9269648383.

The spelling of 12155413 in words is "twelve million, one hundred fifty-five thousand, four hundred thirteen".