1642279 has 2 divisors, whose sum is σ = 1642280. Its totient is φ = 1642278.

The previous prime is 1642273. The next prime is 1642283. The reversal of 1642279 is 9722461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642279 - 2⁵ = 1642247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1642279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821139 + 821140.

It is an arithmetic number, because the mean of its divisors is an integer number (821140).

2^1642279 is an apocalyptic number.

1642279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642279 is an equidigital number, since it uses as much as digits as its factorization.

1642279 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 1642279 is about 1281.5143385854. The cubic root of 1642279 is about 117.9819708163.

The spelling of 1642279 in words is "one million, six hundred forty-two thousand, two hundred seventy-nine".