628121 has 8 divisors (see below), whose sum is σ = 712320. Its totient is φ = 549072.

The previous prime is 628097. The next prime is 628127. The reversal of 628121 is 121826.

628121 is nontrivially palindromic in base 16.

628121 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 a cyclic number.

It is not a de Polignac number, because 628121 - 2⁶ = 628057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 628093 and 628102.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628121.

It is not an unprimeable number, because it can be changed into a prime (628127) 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, 1025 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (89040).

2⁶²⁸¹²¹ is an apocalyptic number.

It is an amenable number.

628121 is a deficient number, since it is larger than the sum of its proper divisors (84199).

628121 is a wasteful number, since it uses less digits than its factorization.

628121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575.

The product of its digits is 192, while the sum is 20.

The square root of 628121 is about 792.5408506822. The cubic root of 628121 is about 85.6408766979.

Adding to 628121 its reverse (121826), we get a palindrome (749947).

The spelling of 628121 in words is "six hundred twenty-eight thousand, one hundred twenty-one".