1662055121 has 2 divisors, whose sum is σ = 1662055122. Its totient is φ = 1662055120.

The previous prime is 1662055103. The next prime is 1662055127. The reversal of 1662055121 is 1215502661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977500225 + 684554896 = 31265^2 + 26164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662055121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1662055127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831027560 + 831027561.

It is an arithmetic number, because the mean of its divisors is an integer number (831027561).

Almost surely, 2^1662055121 is an apocalyptic number.

It is an amenable number.

1662055121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662055121 is an equidigital number, since it uses as much as digits as its factorization.

1662055121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1662055121 is about 40768.3102544121. The cubic root of 1662055121 is about 1184.5365729878.

Adding to 1662055121 its reverse (1215502661), we get a palindrome (2877557782).

The spelling of 1662055121 in words is "one billion, six hundred sixty-two million, fifty-five thousand, one hundred twenty-one".