1398427 has 2 divisors, whose sum is σ = 1398428. Its totient is φ = 1398426.

The previous prime is 1398421. The next prime is 1398451. The reversal of 1398427 is 7248931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398427 - 2¹⁵ = 1365659 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1398392 and 1398401.

It is not a weakly prime, because it can be changed into another prime (1398421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699213 + 699214.

It is an arithmetic number, because the mean of its divisors is an integer number (699214).

2^1398427 is an apocalyptic number.

1398427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398427 is an equidigital number, since it uses as much as digits as its factorization.

1398427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 1398427 is about 1182.5510559802. The cubic root of 1398427 is about 111.8269809423.

The spelling of 1398427 in words is "one million, three hundred ninety-eight thousand, four hundred twenty-seven".