621316 has 12 divisors (see below), whose sum is σ = 1151388. Its totient is φ = 292352.

The previous prime is 621301. The next prime is 621317. The reversal of 621316 is 613126.

It can be written as a sum of positive squares in 2 ways, for example, as 193600 + 427716 = 440^2 + 654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 621293 and 621302.

It is not an unprimeable number, because it can be changed into a prime (621317) by changing a digit.

621316 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4501 + ... + 4636.

It is an arithmetic number, because the mean of its divisors is an integer number (95949).

2⁶²¹³¹⁶ is an apocalyptic number.

It is an amenable number.

621316 is a deficient number, since it is larger than the sum of its proper divisors (530072).

621316 is a wasteful number, since it uses less digits than its factorization.

621316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158 (or 9156 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 621316 is about 788.2360052675. The cubic root of 621316 is about 85.3304781488.

It can be divided in two parts, 62 and 1316, that added together give a triangular number (1378 = T₅₂).

The spelling of 621316 in words is "six hundred twenty-one thousand, three hundred sixteen".