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2205706 = 21102853
BaseRepresentation
bin1000011010100000001010
311011001122211
420122200022
51031040311
6115135334
724514426
oct10324012
94131584
102205706
1112771a8
128a454a
135c2c69
14415b86
152d8821
hex21a80a

2205706 has 4 divisors (see below), whose sum is σ = 3308562. Its totient is φ = 1102852.

The previous prime is 2205703. The next prime is 2205713. The reversal of 2205706 is 6075022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 502681 = 1305^2 + 709^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2205703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551425 + ... + 551428.

22205706 is an apocalyptic number.

2205706 is a deficient number, since it is larger than the sum of its proper divisors (1102856).

2205706 is a wasteful number, since it uses less digits than its factorization.

2205706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102855.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2205706 is about 1485.1619440317. The cubic root of 2205706 is about 130.1714896561.

It can be divided in two parts, 2205 and 706, that multiplied together give a triangular number (1556730 = T1764).

The spelling of 2205706 in words is "two million, two hundred five thousand, seven hundred six".

Divisors: 1 2 1102853 2205706