621430 has 8 divisors (see below), whose sum is σ = 1118592. Its totient is φ = 248568.

The previous prime is 621427. The next prime is 621431. The reversal of 621430 is 34126.

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

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621431) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31062 + ... + 31081.

It is an arithmetic number, because the mean of its divisors is an integer number (139824).

2⁶²¹⁴³⁰ is an apocalyptic number.

621430 is a deficient number, since it is larger than the sum of its proper divisors (497162).

621430 is a wasteful number, since it uses less digits than its factorization.

621430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62150.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 621430 is about 788.3083153183. The cubic root of 621430 is about 85.3356966848.

Adding to 621430 its reverse (34126), we get a palindrome (655556).

The spelling of 621430 in words is "six hundred twenty-one thousand, four hundred thirty".