621226 has 8 divisors (see below), whose sum is σ = 935424. Its totient is φ = 309420.

The previous prime is 621223. The next prime is 621227. The reversal of 621226 is 622126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (621223) 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, 361 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (116928).

2⁶²¹²²⁶ is an apocalyptic number.

621226 is a deficient number, since it is larger than the sum of its proper divisors (314198).

621226 is a wasteful number, since it uses less digits than its factorization.

621226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196.

The product of its digits is 288, while the sum is 19.

The square root of 621226 is about 788.1789136992. The cubic root of 621226 is about 85.3263578011.

Subtracting 621226 from its reverse (622126), we obtain a square (900 = 30²).

It can be divided in two parts, 62122 and 6, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 621226 in words is "six hundred twenty-one thousand, two hundred twenty-six".