2543606 has 24 divisors (see below), whose sum is σ = 4352544. Its totient is φ = 1108080.

The previous prime is 2543573. The next prime is 2543609. The reversal of 2543606 is 6063452.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 5⁹ + 4⁶ + 3¹² + 6⁵ + 0 + 6⁶ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9251 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (181356).

2^2543606 is an apocalyptic number.

2543606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2543606 is a deficient number, since it is larger than the sum of its proper divisors (1808938).

2543606 is a wasteful number, since it uses less digits than its factorization.

2543606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2543606 is about 1594.8686466289. The cubic root of 2543606 is about 136.5054361461.

The spelling of 2543606 in words is "two million, five hundred forty-three thousand, six hundred six".