621236 has 24 divisors (see below), whose sum is σ = 1356096. Its totient is φ = 241920.

The previous prime is 621227. The next prime is 621239. The reversal of 621236 is 632126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621239) by changing a digit.

621236 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, 701 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (56504).

2⁶²¹²³⁶ is an apocalyptic number.

It is an amenable number.

621236 is an abundant number, since it is smaller than the sum of its proper divisors (734860).

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

621236 is a wasteful number, since it uses less digits than its factorization.

621236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039 (or 2037 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 621236 is about 788.1852574110. The cubic root of 621236 is about 85.3268156372.

The spelling of 621236 in words is "six hundred twenty-one thousand, two hundred thirty-six".