1642852217 has 2 divisors, whose sum is σ = 1642852218. Its totient is φ = 1642852216.

The previous prime is 1642852201. The next prime is 1642852219. The reversal of 1642852217 is 7122582461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1537502521 + 105349696 = 39211^2 + 10264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642852217 - 2⁴ = 1642852201 is a prime.

Together with 1642852219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1642852219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821426108 + 821426109.

It is an arithmetic number, because the mean of its divisors is an integer number (821426109).

Almost surely, 2^1642852217 is an apocalyptic number.

It is an amenable number.

1642852217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642852217 is an equidigital number, since it uses as much as digits as its factorization.

1642852217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 1642852217 is about 40532.1134040652. The cubic root of 1642852217 is about 1179.9569593130.

The spelling of 1642852217 in words is "one billion, six hundred forty-two million, eight hundred fifty-two thousand, two hundred seventeen".