121628 has 12 divisors (see below), whose sum is σ = 229320. Its totient is φ = 56112.

The previous prime is 121621. The next prime is 121631. The reversal of 121628 is 826121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (19110).

2¹²¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

121628 is a deficient number, since it is larger than the sum of its proper divisors (107692).

121628 is a wasteful number, since it uses less digits than its factorization.

121628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356 (or 2354 counting only the distinct ones).

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

The square root of 121628 is about 348.7520609258. The cubic root of 121628 is about 49.5462954970.

Adding to 121628 its reverse (826121), we get a palindrome (947749).

The spelling of 121628 in words is "one hundred twenty-one thousand, six hundred twenty-eight".