621022 has 4 divisors (see below), whose sum is σ = 931536. Its totient is φ = 310510.

The previous prime is 621017. The next prime is 621029. The reversal of 621022 is 220126.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220126 = 2 ⋅110063.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 620993 and 621011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621029) by changing a digit.

621022 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155254 + ... + 155257.

It is an arithmetic number, because the mean of its divisors is an integer number (232884).

2⁶²¹⁰²² is an apocalyptic number.

621022 is a deficient number, since it is larger than the sum of its proper divisors (310514).

621022 is a wasteful number, since it uses less digits than its factorization.

621022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310513.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 621022 is about 788.0494908316. The cubic root of 621022 is about 85.3170168728.

Adding to 621022 its reverse (220126), we get a palindrome (841148).

The spelling of 621022 in words is "six hundred twenty-one thousand, twenty-two".