487294821 has 12 divisors (see below), whose sum is σ = 758014348. Its totient is φ = 299873664.

The previous prime is 487294807. The next prime is 487294823. The reversal of 487294821 is 128492784.

487294821 is a `hidden beast` number, since 487 + 2 + 94 + 82 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 177182721 + 310112100 = 13311^2 + 17610^2 .

It is not a de Polignac number, because 487294821 - 2⁵ = 487294789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487294823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2082340 + ... + 2082573.

Almost surely, 2^487294821 is an apocalyptic number.

It is an amenable number.

487294821 is a deficient number, since it is larger than the sum of its proper divisors (270719527).

487294821 is a wasteful number, since it uses less digits than its factorization.

487294821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164932 (or 4164929 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 487294821 is about 22074.7552874318. The cubic root of 487294821 is about 786.9200276952.

The spelling of 487294821 in words is "four hundred eighty-seven million, two hundred ninety-four thousand, eight hundred twenty-one".