1007681 has 2 divisors, whose sum is σ = 1007682.
Its totient is φ = 1007680.
The previous prime is 1007651. The next prime is 1007683. The reversal of 1007681 is 1867001.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 982081 + 25600 = 991^2 + 160^2
It is an emirp because it is prime and its reverse (1867001) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1007681 is a prime.
It is a super-2 number, since 2×10076812 = 2030841995522, which contains 22 as substring.
Together with 1007683, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1007683) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503840 + 503841.
It is an arithmetic number, because the mean of its divisors is an integer number (503841).
21007681 is an apocalyptic number.
It is an amenable number.
1007681 is a deficient number, since it is larger than the sum of its proper divisors (1).
1007681 is an equidigital number, since it uses as much as digits as its factorization.
1007681 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 336, while the sum is 23.
The square root of 1007681 is about 1003.8331534672.
The cubic root of 1007681 is about 100.2553805857.
The spelling of 1007681 in words is "one million, seven thousand, six hundred eighty-one".