1080621 has 12 divisors (see below), whose sum is σ = 1619072. Its totient is φ = 720252.

The previous prime is 1080613. The next prime is 1080647. The reversal of 1080621 is 1260801.

It is not a de Polignac number, because 1080621 - 2³ = 1080613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1080594 and 1080603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1981 + ... + 2466.

2^1080621 is an apocalyptic number.

It is an amenable number.

1080621 is a deficient number, since it is larger than the sum of its proper divisors (538451).

1080621 is an frugal number, since it uses more digits than its factorization.

1080621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1080621 is about 1039.5292203685. The cubic root of 1080621 is about 102.6182177561.

The spelling of 1080621 in words is "one million, eighty thousand, six hundred twenty-one".