65420271 has 16 divisors (see below), whose sum is σ = 110764800. Its totient is φ = 37382904.

The previous prime is 65420269. The next prime is 65420279. The reversal of 65420271 is 17202456.

65420271 is a `hidden beast` number, since 654 + 2 + 0 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 65420271 - 2¹ = 65420269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65420279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172881 + ... + 173258.

It is an arithmetic number, because the mean of its divisors is an integer number (6922800).

Almost surely, 2^65420271 is an apocalyptic number.

65420271 is a deficient number, since it is larger than the sum of its proper divisors (45344529).

65420271 is a wasteful number, since it uses less digits than its factorization.

65420271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346155 (or 346149 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 65420271 is about 8088.2798542088. The cubic root of 65420271 is about 402.9372761438.

The spelling of 65420271 in words is "sixty-five million, four hundred twenty thousand, two hundred seventy-one".