64452121 has 2 divisors, whose sum is σ = 64452122. Its totient is φ = 64452120.

The previous prime is 64452103. The next prime is 64452133. The reversal of 64452121 is 12125446.

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., 56550400 + 7901721 = 7520^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 64452121 - 2²⁵ = 30897689 is a prime.

It is equal to p_3810247 and since 64452121 and 3810247 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64455121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32226060 + 32226061.

It is an arithmetic number, because the mean of its divisors is an integer number (32226061).

Almost surely, 2^64452121 is an apocalyptic number.

It is an amenable number.

64452121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64452121 is an equidigital number, since it uses as much as digits as its factorization.

64452121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 64452121 is about 8028.2078323870. The cubic root of 64452121 is about 400.9397093869.

Adding to 64452121 its reverse (12125446), we get a palindrome (76577567).

The spelling of 64452121 in words is "sixty-four million, four hundred fifty-two thousand, one hundred twenty-one".