65274421 has 4 divisors (see below), whose sum is σ = 65480652. Its totient is φ = 65068192.

The previous prime is 65274409. The next prime is 65274427. The reversal of 65274421 is 12447256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13793796 + 51480625 = 3714^2 + 7175^2 .

It is a cyclic number.

It is not a de Polignac number, because 65274421 - 2⁹ = 65273909 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65274427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102640 + ... + 103273.

It is an arithmetic number, because the mean of its divisors is an integer number (16370163).

Almost surely, 2^65274421 is an apocalyptic number.

It is an amenable number.

65274421 is a deficient number, since it is larger than the sum of its proper divisors (206231).

65274421 is a wasteful number, since it uses less digits than its factorization.

65274421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206230.

The product of its digits is 13440, while the sum is 31.

The square root of 65274421 is about 8079.2586912414. The cubic root of 65274421 is about 402.6376130150.

The spelling of 65274421 in words is "sixty-five million, two hundred seventy-four thousand, four hundred twenty-one".