2405556 has 18 divisors (see below), whose sum is σ = 6080802. Its totient is φ = 801840.

The previous prime is 2405539. The next prime is 2405561. The reversal of 2405556 is 6555042.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 756900 = 1284^2 + 870^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33375 + ... + 33446.

2^2405556 is an apocalyptic number.

It is an amenable number.

2405556 is an abundant number, since it is smaller than the sum of its proper divisors (3675246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2405556 is a wasteful number, since it uses less digits than its factorization.

2405556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66831 (or 66826 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2405556 is about 1550.9854931623. The cubic root of 2405556 is about 133.9898262121.

The spelling of 2405556 in words is "two million, four hundred five thousand, five hundred fifty-six".