65474021 has 4 divisors (see below), whose sum is σ = 69325452. Its totient is φ = 61622592.

The previous prime is 65474009. The next prime is 65474039. The reversal of 65474021 is 12047456.

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 52041796 + 13432225 = 7214^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 65474021 - 2¹⁰ = 65472997 is a prime.

It is a super-3 number, since 3×65474021³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65474041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925690 + ... + 1925723.

It is an arithmetic number, because the mean of its divisors is an integer number (17331363).

Almost surely, 2^65474021 is an apocalyptic number.

It is an amenable number.

65474021 is a deficient number, since it is larger than the sum of its proper divisors (3851431).

65474021 is a wasteful number, since it uses less digits than its factorization.

65474021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851430.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 65474021 is about 8091.6018809628. The cubic root of 65474021 is about 403.0475984721.

The spelling of 65474021 in words is "sixty-five million, four hundred seventy-four thousand, twenty-one".