621117 has 12 divisors (see below), whose sum is σ = 1025440. Its totient is φ = 354888.

The previous prime is 621113. The next prime is 621133. The reversal of 621117 is 711126.

It is not a de Polignac number, because 621117 - 2² = 621113 is a prime.

It is a Duffinian number.

621117 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 621117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4867 + ... + 4992.

2⁶²¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

621117 is a deficient number, since it is larger than the sum of its proper divisors (404323).

621117 is a wasteful number, since it uses less digits than its factorization.

621117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872 (or 9869 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 621117 is about 788.1097639289. The cubic root of 621117 is about 85.3213670693.

Subtracting 621117 from its reverse (711126), we obtain a palindrome (90009).

The spelling of 621117 in words is "six hundred twenty-one thousand, one hundred seventeen".