65312461 has 4 divisors (see below), whose sum is σ = 65518812. Its totient is φ = 65106112.

The previous prime is 65312449. The next prime is 65312491. The reversal of 65312461 is 16421356.

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 29909961 + 35402500 = 5469^2 + 5950^2 .

It is a cyclic number.

It is not a de Polignac number, because 65312461 - 2¹³ = 65304269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65312431) 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, 102700 + ... + 103333.

It is an arithmetic number, because the mean of its divisors is an integer number (16379703).

Almost surely, 2^65312461 is an apocalyptic number.

It is an amenable number.

65312461 is a deficient number, since it is larger than the sum of its proper divisors (206351).

65312461 is a wasteful number, since it uses less digits than its factorization.

65312461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206350.

The product of its digits is 4320, while the sum is 28.

The square root of 65312461 is about 8081.6125247379. The cubic root of 65312461 is about 402.7158129195.

The spelling of 65312461 in words is "sixty-five million, three hundred twelve thousand, four hundred sixty-one".