2255421 has 24 divisors (see below), whose sum is σ = 3565920. Its totient is φ = 1264032.

The previous prime is 2255419. The next prime is 2255437. The reversal of 2255421 is 1245522.

It is a happy number.

2255421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2255421 - 2¹ = 2255419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

2255421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2255411) 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 23 ways as a sum of consecutive naturals, for example, 9735 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (148580).

2^2255421 is an apocalyptic number.

2255421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2255421 is a deficient number, since it is larger than the sum of its proper divisors (1310499).

2255421 is a wasteful number, since it uses less digits than its factorization.

2255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 306 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 2255421 is about 1501.8059128929. The cubic root of 2255421 is about 131.1422226328.

The spelling of 2255421 in words is "two million, two hundred fifty-five thousand, four hundred twenty-one".