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561251 is a prime number
BaseRepresentation
bin10001001000001100011
31001111220002
42021001203
5120430001
620010215
74525205
oct2110143
91044802
10561251
11353749
1223096b
13168602
14108775
15b146b
hex89063

561251 has 2 divisors, whose sum is σ = 561252. Its totient is φ = 561250.

The previous prime is 561229. The next prime is 561277. The reversal of 561251 is 152165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561251 - 210 = 560227 is a prime.

It is not a weakly prime, because it can be changed into another prime (561551) 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, 280625 + 280626.

It is an arithmetic number, because the mean of its divisors is an integer number (280626).

2561251 is an apocalyptic number.

561251 is a deficient number, since it is larger than the sum of its proper divisors (1).

561251 is an equidigital number, since it uses as much as digits as its factorization.

561251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 20.

The square root of 561251 is about 749.1668705969. The cubic root of 561251 is about 82.4870380615.

The spelling of 561251 in words is "five hundred sixty-one thousand, two hundred fifty-one".