621598 has 8 divisors (see below), whose sum is σ = 973008. Its totient is φ = 297264.

The previous prime is 621583. The next prime is 621611. The reversal of 621598 is 895126.

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

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 6711 + ... + 6802.

It is an arithmetic number, because the mean of its divisors is an integer number (121626).

2⁶²¹⁵⁹⁸ is an apocalyptic number.

621598 is a deficient number, since it is larger than the sum of its proper divisors (351410).

621598 is a wasteful number, since it uses less digits than its factorization.

621598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13538.

The product of its digits is 4320, while the sum is 31.

The square root of 621598 is about 788.4148654103. The cubic root of 621598 is about 85.3433859956.

The spelling of 621598 in words is "six hundred twenty-one thousand, five hundred ninety-eight".