65061421 has 2 divisors, whose sum is σ = 65061422. Its totient is φ = 65061420.

The previous prime is 65061407. The next prime is 65061427. The reversal of 65061421 is 12416056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 837225 = 8014^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 65061421 - 2¹⁵ = 65028653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65061427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32530710 + 32530711.

It is an arithmetic number, because the mean of its divisors is an integer number (32530711).

Almost surely, 2^65061421 is an apocalyptic number.

It is an amenable number.

65061421 is a deficient number, since it is larger than the sum of its proper divisors (1).

65061421 is an equidigital number, since it uses as much as digits as its factorization.

65061421 is an evil number, because the sum of its binary digits is even.

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

The square root of 65061421 is about 8066.0660175825. The cubic root of 65061421 is about 402.1991806031.

Adding to 65061421 its reverse (12416056), we get a palindrome (77477477).

The spelling of 65061421 in words is "sixty-five million, sixty-one thousand, four hundred twenty-one".