1642297 has 2 divisors, whose sum is σ = 1642298. Its totient is φ = 1642296.

The previous prime is 1642283. The next prime is 1642309. The reversal of 1642297 is 7922461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 674041 = 984^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642297 - 2¹⁹ = 1118009 is a prime.

1642297 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1642247) 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, 821148 + 821149.

It is an arithmetic number, because the mean of its divisors is an integer number (821149).

2^1642297 is an apocalyptic number.

It is an amenable number.

1642297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642297 is an equidigital number, since it uses as much as digits as its factorization.

1642297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 1642297 is about 1281.5213615075. The cubic root of 1642297 is about 117.9824018571.

The spelling of 1642297 in words is "one million, six hundred forty-two thousand, two hundred ninety-seven".