1720542227 has 2 divisors, whose sum is σ = 1720542228. Its totient is φ = 1720542226.

The previous prime is 1720542221. The next prime is 1720542281. The reversal of 1720542227 is 7222450271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1720542227 - 2²⁰ = 1719493651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1720542193 and 1720542202.

It is not a weakly prime, because it can be changed into another prime (1720542221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860271113 + 860271114.

It is an arithmetic number, because the mean of its divisors is an integer number (860271114).

Almost surely, 2^1720542227 is an apocalyptic number.

1720542227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720542227 is an equidigital number, since it uses as much as digits as its factorization.

1720542227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 1720542227 is about 41479.4193185006. The cubic root of 1720542227 is about 1198.2711741545.

Adding to 1720542227 its reverse (7222450271), we get a palindrome (8942992498).

The spelling of 1720542227 in words is "one billion, seven hundred twenty million, five hundred forty-two thousand, two hundred twenty-seven".