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1146581 is a prime number

1146581 has 2 divisors, whose sum is σ = 1146582. Its totient is φ = 1146580.

The previous prime is 1146569. The next prime is 1146661. The reversal of 1146581 is 1856411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 1681 = 1070^2 + 41^2 .

It is an emirp because it is prime and its reverse (1856411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1146581 - 218 = 884437 is a prime.

It is a super-2 number, since 2×11465812 = 2629295979122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1146581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1146511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573290 + 573291.

It is an arithmetic number, because the mean of its divisors is an integer number (573291).

21146581 is an apocalyptic number.

It is an amenable number.

1146581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146581 is an equidigital number, since it uses as much as digits as its factorization.

1146581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 1146581 is about 1070.7852258973. The cubic root of 1146581 is about 104.6650246992.

The spelling of 1146581 in words is "one million, one hundred forty-six thousand, five hundred eighty-one".