662025121 has 2 divisors, whose sum is σ = 662025122. Its totient is φ = 662025120.

The previous prime is 662025109. The next prime is 662025139. The reversal of 662025121 is 121520266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660490000 + 1535121 = 25700^2 + 1239^2 .

It is a cyclic number.

It is not a de Polignac number, because 662025121 - 2²³ = 653636513 is a prime.

It is not a weakly prime, because it can be changed into another prime (662028121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331012560 + 331012561.

It is an arithmetic number, because the mean of its divisors is an integer number (331012561).

Almost surely, 2^662025121 is an apocalyptic number.

It is an amenable number.

662025121 is a deficient number, since it is larger than the sum of its proper divisors (1).

662025121 is an equidigital number, since it uses as much as digits as its factorization.

662025121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 662025121 is about 25729.8488336018. The cubic root of 662025121 is about 871.5483595494.

Adding to 662025121 its reverse (121520266), we get a palindrome (783545387).

The spelling of 662025121 in words is "six hundred sixty-two million, twenty-five thousand, one hundred twenty-one".