2558421 has 6 divisors (see below), whose sum is σ = 3695510. Its totient is φ = 1705608.

The previous prime is 2558419. The next prime is 2558429. The reversal of 2558421 is 1248552.

It is a happy number.

2558421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2387025 + 171396 = 1545^2 + 414^2 .

It is not a de Polignac number, because 2558421 - 2¹ = 2558419 is a prime.

It is a Duffinian number.

2558421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558429) 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 5 ways as a sum of consecutive naturals, for example, 142126 + ... + 142143.

2^2558421 is an apocalyptic number.

It is an amenable number.

2558421 is a deficient number, since it is larger than the sum of its proper divisors (1137089).

2558421 is a wasteful number, since it uses less digits than its factorization.

2558421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284275 (or 284272 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2558421 is about 1599.5064863888. The cubic root of 2558421 is about 136.7699444077.

The spelling of 2558421 in words is "two million, five hundred fifty-eight thousand, four hundred twenty-one".