1008621 has 6 divisors (see below), whose sum is σ = 1456910. Its totient is φ = 672408.

The previous prime is 1008617. The next prime is 1008659. The reversal of 1008621 is 1268001.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 171396 = 915^2 + 414^2 .

It is not a de Polignac number, because 1008621 - 2² = 1008617 is a prime.

It is a Duffinian number.

It is a Curzon number.

1008621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1008594 and 1008603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1008611) 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, 56026 + ... + 56043.

2^1008621 is an apocalyptic number.

It is an amenable number.

1008621 is a deficient number, since it is larger than the sum of its proper divisors (448289).

1008621 is a wasteful number, since it uses less digits than its factorization.

1008621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112075 (or 112072 counting only the distinct ones).

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

The square root of 1008621 is about 1004.3012496258. The cubic root of 1008621 is about 100.2865448032.

The spelling of 1008621 in words is "one million, eight thousand, six hundred twenty-one".