2455 has 4 divisors (see below), whose sum is σ = 2952. Its totient is φ = 1960.
The previous prime is 2447. The next prime is 2459. The reversal of 2455 is 5542.
It is a happy number.
2455 is nontrivially palindromic in base 15.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 2455 - 23 = 2447 is a prime.
It is a Duffinian number.
2455 is an undulating number in base 15.
It is a plaindrome in base 10 and base 13.
It is a nialpdrome in base 14 and base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2459) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241 + ... + 250.
It is an arithmetic number, because the mean of its divisors is an integer number (738).
2455 is a deficient number, since it is larger than the sum of its proper divisors (497).
2455 is an equidigital number, since it uses as much as digits as its factorization.
2455 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 496.
The product of its digits is 200, while the sum is 16.
The square root of 2455 is about 49.5479565673. The cubic root of 2455 is about 13.4901620139.
Adding to 2455 its reverse (5542), we get a palindrome (7997).
It can be divided in two parts, 245 and 5, that multiplied together give a triangular number (1225 = T49).
The spelling of 2455 in words is "two thousand, four hundred fifty-five".
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