621016 has 16 divisors (see below), whose sum is σ = 1270440. Its totient is φ = 282240.

The previous prime is 621013. The next prime is 621017. The reversal of 621016 is 610126.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621013) 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 3 ways as a sum of consecutive naturals, for example, 3441 + ... + 3616.

2⁶²¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

621016 is an abundant number, since it is smaller than the sum of its proper divisors (649424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621016 is a wasteful number, since it uses less digits than its factorization.

621016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074 (or 7070 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 621016 is about 788.0456839549. The cubic root of 621016 is about 85.3167421086.

Subtracting from 621016 its product of nonzero digits (72), we obtain a square (620944 = 788²).

It can be divided in two parts, 6210 and 16, that added together give a palindrome (6226).

The spelling of 621016 in words is "six hundred twenty-one thousand, sixteen".