621244 has 18 divisors (see below), whose sum is σ = 1178520. Its totient is φ = 286416.

The previous prime is 621241. The next prime is 621259. The reversal of 621244 is 442126.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217 + ... + 1135.

2⁶²¹²⁴⁴ is an apocalyptic number.

It is an amenable number.

621244 is a deficient number, since it is larger than the sum of its proper divisors (557276).

621244 is a wasteful number, since it uses less digits than its factorization.

621244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 934 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 621244 is about 788.1903323437. The cubic root of 621244 is about 85.3271819025.

It can be divided in two parts, 62124 and 4, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 621244 in words is "six hundred twenty-one thousand, two hundred forty-four".