1243129 has 2 divisors, whose sum is σ = 1243130. Its totient is φ = 1243128.

The previous prime is 1243111. The next prime is 1243133. The reversal of 1243129 is 9213421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 76729 = 1080^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243129 - 2⁵ = 1243097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621564 + 621565.

It is an arithmetic number, because the mean of its divisors is an integer number (621565).

2^1243129 is an apocalyptic number.

It is an amenable number.

1243129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243129 is an equidigital number, since it uses as much as digits as its factorization.

1243129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1243129 is about 1114.9569498416. The cubic root of 1243129 is about 107.5239968062.

The spelling of 1243129 in words is "one million, two hundred forty-three thousand, one hundred twenty-nine".