1378427 has 2 divisors, whose sum is σ = 1378428. Its totient is φ = 1378426.

The previous prime is 1378397. The next prime is 1378439. The reversal of 1378427 is 7248731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378427 - 2¹⁰ = 1377403 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378393 and 1378402.

It is not a weakly prime, because it can be changed into another prime (1377427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689213 + 689214.

It is an arithmetic number, because the mean of its divisors is an integer number (689214).

2^1378427 is an apocalyptic number.

1378427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378427 is an equidigital number, since it uses as much as digits as its factorization.

1378427 is an evil number, because the sum of its binary digits is even.

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

The square root of 1378427 is about 1174.0643082898. The cubic root of 1378427 is about 111.2913106692.

The spelling of 1378427 in words is "one million, three hundred seventy-eight thousand, four hundred twenty-seven".