2566420 has 12 divisors (see below), whose sum is σ = 5389524. Its totient is φ = 1026560.

The previous prime is 2566411. The next prime is 2566423. The reversal of 2566420 is 246652.

It can be written as a sum of positive squares in 2 ways, for example, as 917764 + 1648656 = 958^2 + 1284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64141 + ... + 64180.

It is an arithmetic number, because the mean of its divisors is an integer number (449127).

2^2566420 is an apocalyptic number.

2566420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566420 is an abundant number, since it is smaller than the sum of its proper divisors (2823104).

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

2566420 is a wasteful number, since it uses less digits than its factorization.

2566420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128330 (or 128328 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2566420 is about 1602.0049937500. The cubic root of 2566420 is about 136.9123349152.

The spelling of 2566420 in words is "two million, five hundred sixty-six thousand, four hundred twenty".