2159455 has 4 divisors (see below), whose sum is σ = 2591352. Its totient is φ = 1727560.

The previous prime is 2159453. The next prime is 2159473. The reversal of 2159455 is 5549512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2159455 - 2¹ = 2159453 is a prime.

It is a Smith number, since the sum of its digits (31) 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 (2159453) 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, 215941 + ... + 215950.

It is an arithmetic number, because the mean of its divisors is an integer number (647838).

2^2159455 is an apocalyptic number.

2159455 is a deficient number, since it is larger than the sum of its proper divisors (431897).

2159455 is an equidigital number, since it uses as much as digits as its factorization.

2159455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431896.

The product of its digits is 9000, while the sum is 31.

The square root of 2159455 is about 1469.5084212076. The cubic root of 2159455 is about 129.2552085716.

The spelling of 2159455 in words is "two million, one hundred fifty-nine thousand, four hundred fifty-five".