6118821 has 10 divisors (see below), whose sum is σ = 9140582. Its totient is φ = 4079160.

The previous prime is 6118769. The next prime is 6118823. The reversal of 6118821 is 1288116.

It can be written as a sum of positive squares in only one way, i.e., 5225796 + 893025 = 2286^2 + 945^2 .

It is not a de Polignac number, because 6118821 - 2⁹ = 6118309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6118823) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37690 + ... + 37851.

Almost surely, 2^6118821 is an apocalyptic number.

It is an amenable number.

6118821 is a deficient number, since it is larger than the sum of its proper divisors (3021761).

6118821 is an equidigital number, since it uses as much as digits as its factorization.

6118821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75553 (or 75544 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 6118821 is about 2473.6250726414. The cubic root of 6118821 is about 182.9037386776.

The spelling of 6118821 in words is "six million, one hundred eighteen thousand, eight hundred twenty-one".