487665121 has 4 divisors (see below), whose sum is σ = 487714500. Its totient is φ = 487615744.

The previous prime is 487665119. The next prime is 487665151. The reversal of 487665121 is 121566784.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 465912225 = 4664^2 + 21585^2 .

It is a cyclic number.

It is not a de Polignac number, because 487665121 - 2¹ = 487665119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487665151) 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, 4216 + ... + 31513.

It is an arithmetic number, because the mean of its divisors is an integer number (121928625).

Almost surely, 2^487665121 is an apocalyptic number.

It is an amenable number.

487665121 is a deficient number, since it is larger than the sum of its proper divisors (49379).

487665121 is a wasteful number, since it uses less digits than its factorization.

487665121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49378.

The product of its digits is 80640, while the sum is 40.

The square root of 487665121 is about 22083.1411035659. The cubic root of 487665121 is about 787.1193065801.

The spelling of 487665121 in words is "four hundred eighty-seven million, six hundred sixty-five thousand, one hundred twenty-one".