1387427 has 2 divisors, whose sum is σ = 1387428. Its totient is φ = 1387426.

The previous prime is 1387417. The next prime is 1387433. The reversal of 1387427 is 7247831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387427 - 2⁶ = 1387363 is a prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1387393 and 1387402.

It is not a weakly prime, because it can be changed into another prime (1387417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693713 + 693714.

It is an arithmetic number, because the mean of its divisors is an integer number (693714).

2^1387427 is an apocalyptic number.

1387427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387427 is an equidigital number, since it uses as much as digits as its factorization.

1387427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 1387427 is about 1177.8909117571. The cubic root of 1387427 is about 111.5329991410.

The spelling of 1387427 in words is "one million, three hundred eighty-seven thousand, four hundred twenty-seven".