621470 has 16 divisors (see below), whose sum is σ = 1157760. Its totient is φ = 239904.

The previous prime is 621461. The next prime is 621473. The reversal of 621470 is 74126.

It is a plaindrome in base 14.

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 621470.

It is not an unprimeable number, because it can be changed into a prime (621473) by changing a digit.

621470 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 in 7 ways as a sum of consecutive naturals, for example, 782 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (72360).

2⁶²¹⁴⁷⁰ is an apocalyptic number.

621470 is a deficient number, since it is larger than the sum of its proper divisors (536290).

621470 is a wasteful number, since it uses less digits than its factorization.

621470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 621470 is about 788.3336856941. Note that the first 3 decimals coincide. The cubic root of 621470 is about 85.3375275987.

Adding to 621470 its reverse (74126), we get a palindrome (695596).

The spelling of 621470 in words is "six hundred twenty-one thousand, four hundred seventy".