621674 has 16 divisors (see below), whose sum is σ = 992256. Its totient is φ = 291600.

The previous prime is 621671. The next prime is 621679. The reversal of 621674 is 476126.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621671) 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 7 ways as a sum of consecutive naturals, for example, 2159 + ... + 2429.

It is an arithmetic number, because the mean of its divisors is an integer number (62016).

2⁶²¹⁶⁷⁴ is an apocalyptic number.

621674 is a deficient number, since it is larger than the sum of its proper divisors (370582).

621674 is a wasteful number, since it uses less digits than its factorization.

621674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its digits is 2016, while the sum is 26.

The square root of 621674 is about 788.4630619122. The cubic root of 621674 is about 85.3468640382.

The spelling of 621674 in words is "six hundred twenty-one thousand, six hundred seventy-four".