1012789 has 2 divisors, whose sum is σ = 1012790. Its totient is φ = 1012788.

The previous prime is 1012771. The next prime is 1012811. The reversal of 1012789 is 9872101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600625 + 412164 = 775^2 + 642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012789 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506394 + 506395.

It is an arithmetic number, because the mean of its divisors is an integer number (506395).

2^1012789 is an apocalyptic number.

It is an amenable number.

1012789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012789 is an equidigital number, since it uses as much as digits as its factorization.

1012789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1012789 is about 1006.3741848835. The cubic root of 1012789 is about 100.4244954861.

The spelling of 1012789 in words is "one million, twelve thousand, seven hundred eighty-nine".