1012861 has 2 divisors, whose sum is σ = 1012862. Its totient is φ = 1012860.

The previous prime is 1012831. The next prime is 1012903. The reversal of 1012861 is 1682101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 32761 = 990^2 + 181^2 .

It is an emirp because it is prime and its reverse (1682101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012861 - 2⁵ = 1012829 is a prime.

1012861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506430 + 506431.

It is an arithmetic number, because the mean of its divisors is an integer number (506431).

2^1012861 is an apocalyptic number.

It is an amenable number.

1012861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012861 is an equidigital number, since it uses as much as digits as its factorization.

1012861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1012861 is about 1006.4099562306. The cubic root of 1012861 is about 100.4268751829.

Adding to 1012861 its reverse (1682101), we get a palindrome (2694962).

The spelling of 1012861 in words is "one million, twelve thousand, eight hundred sixty-one".