621446 has 8 divisors (see below), whose sum is σ = 1065360. Its totient is φ = 266328.

The previous prime is 621443. The next prime is 621451. The reversal of 621446 is 644126.

It is a happy number.

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

It is a Curzon number.

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 621446.

It is not an unprimeable number, because it can be changed into a prime (621443) 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, 22181 + ... + 22208.

It is an arithmetic number, because the mean of its divisors is an integer number (133170).

2⁶²¹⁴⁴⁶ is an apocalyptic number.

621446 is a deficient number, since it is larger than the sum of its proper divisors (443914).

621446 is a wasteful number, since it uses less digits than its factorization.

621446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44398.

The product of its digits is 1152, while the sum is 23.

The square root of 621446 is about 788.3184635666. The cubic root of 621446 is about 85.3364290598.

The spelling of 621446 in words is "six hundred twenty-one thousand, four hundred forty-six".