2155449 has 8 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1432496.

The previous prime is 2155429. The next prime is 2155451. The reversal of 2155449 is 9445512.

2155449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2155449 - 2¹¹ = 2153401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (360360).

2^2155449 is an apocalyptic number.

It is an amenable number.

2155449 is a deficient number, since it is larger than the sum of its proper divisors (727431).

2155449 is a wasteful number, since it uses less digits than its factorization.

2155449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239.

The product of its digits is 7200, while the sum is 30.

The square root of 2155449 is about 1468.1447476322. The cubic root of 2155449 is about 129.1752320832.

The spelling of 2155449 in words is "two million, one hundred fifty-five thousand, four hundred forty-nine".