1428197 has 2 divisors, whose sum is σ = 1428198. Its totient is φ = 1428196.

The previous prime is 1428179. The next prime is 1428199. The reversal of 1428197 is 7918241.

Together with previous prime (1428179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 231361 = 1094^2 + 481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428197 is a prime.

Together with 1428199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714098 + 714099.

It is an arithmetic number, because the mean of its divisors is an integer number (714099).

2^1428197 is an apocalyptic number.

It is an amenable number.

1428197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428197 is an equidigital number, since it uses as much as digits as its factorization.

1428197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1428197 is about 1195.0719643603. The cubic root of 1428197 is about 112.6149475323.

The spelling of 1428197 in words is "one million, four hundred twenty-eight thousand, one hundred ninety-seven".