1238429 has 2 divisors, whose sum is σ = 1238430. Its totient is φ = 1238428.

The previous prime is 1238423. The next prime is 1238431. The reversal of 1238429 is 9248321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214404 + 24025 = 1102^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238429 - 2¹² = 1234333 is a prime.

Together with 1238431, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 1 + 2¹⁰ + 3¹¹ + 8⁴ + 4⁵ + 2²⁰ + 9⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619214 + 619215.

It is an arithmetic number, because the mean of its divisors is an integer number (619215).

2^1238429 is an apocalyptic number.

It is an amenable number.

1238429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238429 is an equidigital number, since it uses as much as digits as its factorization.

1238429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 1238429 is about 1112.8472491766. The cubic root of 1238429 is about 107.3883173997.

The spelling of 1238429 in words is "one million, two hundred thirty-eight thousand, four hundred twenty-nine".