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2556065 = 5511213
BaseRepresentation
bin1001110000000010100001
311210212021002
421300002201
51123243230
6130441345
730504041
oct11600241
94725232
102556065
111496456
12a33255
136b6585
144a7721
15357545
hex2700a1

2556065 has 4 divisors (see below), whose sum is σ = 3067284. Its totient is φ = 2044848.

The previous prime is 2556061. The next prime is 2556067. The reversal of 2556065 is 5606552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1274641 + 1281424 = 1129^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556065 - 22 = 2556061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556061) 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 in 3 ways as a sum of consecutive naturals, for example, 255602 + ... + 255611.

It is an arithmetic number, because the mean of its divisors is an integer number (766821).

22556065 is an apocalyptic number.

It is an amenable number.

2556065 is a deficient number, since it is larger than the sum of its proper divisors (511219).

2556065 is an equidigital number, since it uses as much as digits as its factorization.

2556065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511218.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2556065 is about 1598.7698395954. The cubic root of 2556065 is about 136.7279485893.

The spelling of 2556065 in words is "two million, five hundred fifty-six thousand, sixty-five".

Divisors: 1 5 511213 2556065