64161121 has 2 divisors, whose sum is σ = 64161122. Its totient is φ = 64161120.

The previous prime is 64161107. The next prime is 64161131. The reversal of 64161121 is 12116146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 18800896 = 6735^2 + 4336^2 .

It is a cyclic number.

It is not a de Polignac number, because 64161121 - 2¹³ = 64152929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64161092 and 64161101.

It is not a weakly prime, because it can be changed into another prime (64161131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32080560 + 32080561.

It is an arithmetic number, because the mean of its divisors is an integer number (32080561).

Almost surely, 2^64161121 is an apocalyptic number.

It is an amenable number.

64161121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64161121 is an equidigital number, since it uses as much as digits as its factorization.

64161121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

The square root of 64161121 is about 8010.0637325804. The cubic root of 64161121 is about 400.3353874595.

Adding to 64161121 its reverse (12116146), we get a palindrome (76277267).

The spelling of 64161121 in words is "sixty-four million, one hundred sixty-one thousand, one hundred twenty-one".