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BaseRepresentation
bin1010111011110001001001
312101121202101
422323301021
51213204444
6141233401
733235261
oct12736111
95347671
102866249
111688501
12b62861
13794809
145487a1
153b93d4
hex2bbc49

2866249 has 3 divisors (see below), whose sum is σ = 2867943. Its totient is φ = 2864556.

The previous prime is 2866247. The next prime is 2866261. The reversal of 2866249 is 9426682.

The square root of 2866249 is 1693.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 1774224 = 1045^2 + 1332^2 .

It is not a de Polignac number, because 2866249 - 21 = 2866247 is a prime.

It is a d-powerful number, because it can be written as 217 + 87 + 65 + 66 + 219 + 44 + 95 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2866247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 847 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (955981).

22866249 is an apocalyptic number.

2866249 is the 1693-rd square number.

2866249 is the 847-th centered octagonal number.

It is an amenable number.

2866249 is a deficient number, since it is larger than the sum of its proper divisors (1694).

2866249 is an frugal number, since it uses more digits than its factorization.

2866249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 1693 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The cubic root of 2866249 is about 142.0489317580.

The spelling of 2866249 in words is "two million, eight hundred sixty-six thousand, two hundred forty-nine".

Divisors: 1 1693 2866249