2205646 has 4 divisors (see below), whose sum is σ = 3308472.
Its totient is φ = 1102822.
The previous prime is 2205629. The next prime is 2205649. The reversal of 2205646 is 6465022.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6465022 = 2 ⋅3232511.
It is a self number, because there is not a number n which added to its sum of digits gives 2205646.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2205649) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551410 + ... + 551413.
It is an arithmetic number, because the mean of its divisors is an integer number (827118).
22205646 is an apocalyptic number.
2205646 is a deficient number, since it is larger than the sum of its proper divisors (1102826).
2205646 is a wasteful number, since it uses less digits than its factorization.
2205646 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1102825.
The product of its (nonzero) digits is 2880, while the sum is 25.
The square root of 2205646 is about 1485.1417440770.
The cubic root of 2205646 is about 130.1703093295.
The spelling of 2205646 in words is "two million, two hundred five thousand, six hundred forty-six".