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2120866 = 211149647
BaseRepresentation
bin1000000101110010100010
310222202021121
420011302202
51020331431
6113242454
724012166
oct10056242
93882247
102120866
111219490
1286342a
13593467
143d2ca6
152bd611
hex205ca2

2120866 has 16 divisors (see below), whose sum is σ = 3499200. Its totient is φ = 956080.

The previous prime is 2120863. The next prime is 2120879. The reversal of 2120866 is 6680212.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120866.

It is not an unprimeable number, because it can be changed into a prime (2120863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2955 + ... + 3601.

It is an arithmetic number, because the mean of its divisors is an integer number (218700).

22120866 is an apocalyptic number.

2120866 is a deficient number, since it is larger than the sum of its proper divisors (1378334).

2120866 is a wasteful number, since it uses less digits than its factorization.

2120866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2120866 is about 1456.3193331134. The cubic root of 2120866 is about 128.4806553871.

The spelling of 2120866 in words is "two million, one hundred twenty thousand, eight hundred sixty-six".