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8280001 = 59140339
BaseRepresentation
bin11111100101011111000001
3120120200000201
4133211133001
54104430001
6453245201
7130243642
oct37453701
916520021
108280001
114745984
122933801
13193ba12
1411576c9
15ad8501
hex7e57c1

8280001 has 4 divisors (see below), whose sum is σ = 8420400. Its totient is φ = 8139604.

The previous prime is 8279987. The next prime is 8280011. The reversal of 8280001 is 1000828.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8280001 - 29 = 8279489 is a prime.

It is an Ulam number.

It is a Duffinian number.

8280001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8280011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70111 + ... + 70228.

It is an arithmetic number, because the mean of its divisors is an integer number (2105100).

Almost surely, 28280001 is an apocalyptic number.

It is an amenable number.

8280001 is a deficient number, since it is larger than the sum of its proper divisors (140399).

8280001 is a wasteful number, since it uses less digits than its factorization.

8280001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140398.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 8280001 is about 2877.4990877496. The cubic root of 8280001 is about 202.3066365343.

Adding to 8280001 its reverse (1000828), we get a palindrome (9280829).

The spelling of 8280001 in words is "eight million, two hundred eighty thousand, one".

Divisors: 1 59 140339 8280001