621480 has 32 divisors (see below), whose sum is σ = 1864800. Its totient is φ = 165696.

The previous prime is 621473. The next prime is 621521. The reversal of 621480 is 84126.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621480.

It is an unprimeable number.

621480 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (58275).

2⁶²¹⁴⁸⁰ is an apocalyptic number.

621480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621480 is an abundant number, since it is smaller than the sum of its proper divisors (1243320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621480 is a wasteful number, since it uses less digits than its factorization.

621480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 621480 is about 788.3400281604. The cubic root of 621480 is about 85.3379853150.

The spelling of 621480 in words is "six hundred twenty-one thousand, four hundred eighty".