1238381 has 2 divisors, whose sum is σ = 1238382. Its totient is φ = 1238380.

The previous prime is 1238371. The next prime is 1238383. The reversal of 1238381 is 1838321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 366025 = 934^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238381 - 2⁶ = 1238317 is a prime.

It is a super-2 number, since 2×1238381² = 3067175002322, which contains 22 as substring.

Together with 1238383, it forms a pair of twin primes.

It is a Chen prime.

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

It is equal to p₉₅₆₂₄ and since 1238381 and 95624 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1238381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238383) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619190 + 619191.

It is an arithmetic number, because the mean of its divisors is an integer number (619191).

2^1238381 is an apocalyptic number.

It is an amenable number.

1238381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238381 is an equidigital number, since it uses as much as digits as its factorization.

1238381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1238381 is about 1112.8256826655. The cubic root of 1238381 is about 107.3869299683.

The spelling of 1238381 in words is "one million, two hundred thirty-eight thousand, three hundred eighty-one".