1048390821 has 6 divisors (see below), whose sum is σ = 1514342310. Its totient is φ = 698927208.

The previous prime is 1048390813. The next prime is 1048390843. The reversal of 1048390821 is 1280938401.

1048390821 is a `hidden beast` number, since 10 + 483 + 90 + 82 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 862068321 + 186322500 = 29361^2 + 13650^2 .

It is not a de Polignac number, because 1048390821 - 2³ = 1048390813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1048390801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58243926 + ... + 58243943.

It is an arithmetic number, because the mean of its divisors is an integer number (252390385).

Almost surely, 2^1048390821 is an apocalyptic number.

It is an amenable number.

1048390821 is a deficient number, since it is larger than the sum of its proper divisors (465951489).

1048390821 is a wasteful number, since it uses less digits than its factorization.

1048390821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116487875 (or 116487872 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1048390821 is about 32378.8638003251. The cubic root of 1048390821 is about 1015.8768647788.

The spelling of 1048390821 in words is "one billion, forty-eight million, three hundred ninety thousand, eight hundred twenty-one".