1038821 has 4 divisors (see below), whose sum is σ = 1187232. Its totient is φ = 890412.

The previous prime is 1038811. The next prime is 1038823. The reversal of 1038821 is 1288301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1288301 = 7 ⋅184043.

It is a cyclic number.

It is not a de Polignac number, because 1038821 - 2⁶ = 1038757 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 (1038823) 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, 74195 + ... + 74208.

It is an arithmetic number, because the mean of its divisors is an integer number (296808).

2^1038821 is an apocalyptic number.

It is an amenable number.

1038821 is a deficient number, since it is larger than the sum of its proper divisors (148411).

1038821 is an equidigital number, since it uses as much as digits as its factorization.

1038821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148410.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1038821 is about 1019.2256864895. The cubic root of 1038821 is about 101.2776401701.

The spelling of 1038821 in words is "one million, thirty-eight thousand, eight hundred twenty-one".