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1000981 is a prime number
BaseRepresentation
bin11110100011000010101
31212212002101
43310120111
5224012411
633242101
711336212
oct3643025
91785071
101000981
11624063
12403331
132907c7
141c0b09
1514b8c1
hexf4615

1000981 has 2 divisors, whose sum is σ = 1000982. Its totient is φ = 1000980.

The previous prime is 1000973. The next prime is 1000999. The reversal of 1000981 is 1890001.

1000981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 320356 = 825^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000981 - 23 = 1000973 is a prime.

It is a super-2 number, since 2×10009812 = 2003925924722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500490 + 500491.

It is an arithmetic number, because the mean of its divisors is an integer number (500491).

21000981 is an apocalyptic number.

It is an amenable number.

1000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000981 is an equidigital number, since it uses as much as digits as its factorization.

1000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1000981 is about 1000.4903797638. The cubic root of 1000981 is about 100.0326893129.

Adding to 1000981 its reverse (1890001), we get a palindrome (2890982).

The spelling of 1000981 in words is "one million, nine hundred eighty-one", and thus it is an aban number.