64041421 has 2 divisors, whose sum is σ = 64041422. Its totient is φ = 64041420.

The previous prime is 64041403. The next prime is 64041427. The reversal of 64041421 is 12414046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63776196 + 265225 = 7986^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 64041421 - 2⁹ = 64040909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64041392 and 64041401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64041427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32020710 + 32020711.

It is an arithmetic number, because the mean of its divisors is an integer number (32020711).

Almost surely, 2^64041421 is an apocalyptic number.

It is an amenable number.

64041421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64041421 is an equidigital number, since it uses as much as digits as its factorization.

64041421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 64041421 is about 8002.5883937636. The cubic root of 64041421 is about 400.0862751402.

Adding to 64041421 its reverse (12414046), we get a palindrome (76455467).

The spelling of 64041421 in words is "sixty-four million, forty-one thousand, four hundred twenty-one".