1399427 has 2 divisors, whose sum is σ = 1399428. Its totient is φ = 1399426.

The previous prime is 1399417. The next prime is 1399439. The reversal of 1399427 is 7249931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1399427 - 2¹⁴ = 1383043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1399417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699713 + 699714.

It is an arithmetic number, because the mean of its divisors is an integer number (699714).

2^1399427 is an apocalyptic number.

1399427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399427 is an equidigital number, since it uses as much as digits as its factorization.

1399427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 1399427 is about 1182.9737951451. The cubic root of 1399427 is about 111.8536300121.

The spelling of 1399427 in words is "one million, three hundred ninety-nine thousand, four hundred twenty-seven".