1012189 has 2 divisors, whose sum is σ = 1012190. Its totient is φ = 1012188.

The previous prime is 1012183. The next prime is 1012201. The reversal of 1012189 is 9812101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940900 + 71289 = 970^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012189 - 2⁹ = 1011677 is a prime.

It is a Chen 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 (1012183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506094 + 506095.

It is an arithmetic number, because the mean of its divisors is an integer number (506095).

2^1012189 is an apocalyptic number.

It is an amenable number.

1012189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012189 is an equidigital number, since it uses as much as digits as its factorization.

1012189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1012189 is about 1006.0760408637. The cubic root of 1012189 is about 100.4046602917.

The spelling of 1012189 in words is "one million, twelve thousand, one hundred eighty-nine".