620812 has 6 divisors (see below), whose sum is σ = 1086428. Its totient is φ = 310404.

The previous prime is 620777. The next prime is 620813. The reversal of 620812 is 218026.

It is a happy number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 620812.

It is not an unprimeable number, because it can be changed into a prime (620813) by changing a digit.

620812 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 as a sum of consecutive naturals, namely, 77598 + ... + 77605.

2⁶²⁰⁸¹² is an apocalyptic number.

It is an amenable number.

620812 is a deficient number, since it is larger than the sum of its proper divisors (465616).

620812 is a wasteful number, since it uses less digits than its factorization.

620812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155207 (or 155205 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 620812 is about 787.9162392031. The cubic root of 620812 is about 85.3073990742.

Adding to 620812 its reverse (218026), we get a palindrome (838838).

The spelling of 620812 in words is "six hundred twenty thousand, eight hundred twelve".