1238129 has 2 divisors, whose sum is σ = 1238130. Its totient is φ = 1238128.

The previous prime is 1238119. The next prime is 1238137. The reversal of 1238129 is 9218321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 277729 = 980^2 + 527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238129 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1238098 and 1238107.

It is not a weakly prime, because it can be changed into another prime (1238119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619064 + 619065.

It is an arithmetic number, because the mean of its divisors is an integer number (619065).

2^1238129 is an apocalyptic number.

It is an amenable number.

1238129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238129 is an equidigital number, since it uses as much as digits as its factorization.

1238129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 1238129 is about 1112.7124516244. The cubic root of 1238129 is about 107.3796453652.

The spelling of 1238129 in words is "one million, two hundred thirty-eight thousand, one hundred twenty-nine".