621012 has 24 divisors (see below), whose sum is σ = 1656256. Its totient is φ = 177408.

The previous prime is 621007. The next prime is 621013. The reversal of 621012 is 210126.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621012.

It is not an unprimeable number, because it can be changed into a prime (621013) by changing a digit.

621012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3613 + ... + 3780.

2⁶²¹⁰¹² is an apocalyptic number.

It is an amenable number.

621012 is an abundant number, since it is smaller than the sum of its proper divisors (1035244).

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

621012 is a wasteful number, since it uses less digits than its factorization.

621012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407 (or 7405 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 621012 is about 788.0431460269. The cubic root of 621012 is about 85.3165589315.

Adding to 621012 its reverse (210126), we get a palindrome (831138).

The spelling of 621012 in words is "six hundred twenty-one thousand, twelve".