1381427 has 2 divisors, whose sum is σ = 1381428. Its totient is φ = 1381426.

The previous prime is 1381421. The next prime is 1381439. The reversal of 1381427 is 7241831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1381427 - 2⁴ = 1381411 is a prime.

It is a Chen prime.

It is equal to p₁₀₅₇₉₄ and since 1381427 and 105794 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381396 and 1381405.

It is not a weakly prime, because it can be changed into another prime (1381421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690713 + 690714.

It is an arithmetic number, because the mean of its divisors is an integer number (690714).

2^1381427 is an apocalyptic number.

1381427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381427 is an equidigital number, since it uses as much as digits as its factorization.

1381427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 1381427 is about 1175.3412270486. The cubic root of 1381427 is about 111.3719900742.

The spelling of 1381427 in words is "one million, three hundred eighty-one thousand, four hundred twenty-seven".