672621 has 8 divisors (see below), whose sum is σ = 903840. Its totient is φ = 444912.

The previous prime is 672593. The next prime is 672629. The reversal of 672621 is 126276.

It is a happy number.

672621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 672621 - 2⁶ = 672557 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 672591 and 672600.

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 672621.

It is not an unprimeable number, because it can be changed into a prime (672629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (112980).

2⁶⁷²⁶²¹ is an apocalyptic number.

It is an amenable number.

672621 is a deficient number, since it is larger than the sum of its proper divisors (231219).

672621 is a wasteful number, since it uses less digits than its factorization.

672621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755.

The product of its digits is 1008, while the sum is 24.

The square root of 672621 is about 820.1347450267. The cubic root of 672621 is about 87.6173554571.

Adding to 672621 its reverse (126276), we get a palindrome (798897).

It can be divided in two parts, 6726 and 21, that multiplied together give a triangular number (141246 = T₅₃₁).

The spelling of 672621 in words is "six hundred seventy-two thousand, six hundred twenty-one".