2205629 has 2 divisors, whose sum is σ = 2205630. Its totient is φ = 2205628.

The previous prime is 2205617. The next prime is 2205649. The reversal of 2205629 is 9265022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 273529 = 1390^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205629 - 2⁴ = 2205613 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2205598 and 2205607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102814 + 1102815.

It is an arithmetic number, because the mean of its divisors is an integer number (1102815).

2^2205629 is an apocalyptic number.

It is an amenable number.

2205629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205629 is an equidigital number, since it uses as much as digits as its factorization.

2205629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2205629 is about 1485.1360207065. The cubic root of 2205629 is about 130.1699748997.

It can be divided in two parts, 2205 and 629, that multiplied together give a triangular number (1386945 = T₁₆₆₅).

The spelling of 2205629 in words is "two million, two hundred five thousand, six hundred twenty-nine".