1000498021 has 4 divisors (see below), whose sum is σ = 1010404044. Its totient is φ = 990592000.

The previous prime is 1000498003. The next prime is 1000498033. The reversal of 1000498021 is 1208940001.

It is a happy number.

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 405821025 + 594676996 = 20145^2 + 24386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000498021 - 2⁵ = 1000497989 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 (1000498001) 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, 4952860 + ... + 4953061.

It is an arithmetic number, because the mean of its divisors is an integer number (252601011).

Almost surely, 2^1000498021 is an apocalyptic number.

It is an amenable number.

1000498021 is a deficient number, since it is larger than the sum of its proper divisors (9906023).

1000498021 is an equidigital number, since it uses as much as digits as its factorization.

1000498021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9906022.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1000498021 is about 31630.6500249363. The cubic root of 1000498021 is about 1000.1659794493.

The spelling of 1000498021 in words is "one billion, four hundred ninety-eight thousand, twenty-one".