621464 has 16 divisors (see below), whose sum is σ = 1176120. Its totient is φ = 307840.

The previous prime is 621461. The next prime is 621473. The reversal of 621464 is 464126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621461) 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, 752 + ... + 1344.

2⁶²¹⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

621464 is a deficient number, since it is larger than the sum of its proper divisors (554656).

621464 is a wasteful number, since it uses less digits than its factorization.

621464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 726 counting only the distinct ones).

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

The square root of 621464 is about 788.3298801898. The cubic root of 621464 is about 85.3372529667.

The spelling of 621464 in words is "six hundred twenty-one thousand, four hundred sixty-four".