121630 has 8 divisors (see below), whose sum is σ = 218952. Its totient is φ = 48648.

The previous prime is 121621. The next prime is 121631. The reversal of 121630 is 36121.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121631) by changing a digit.

121630 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 6072 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (27369).

2¹²¹⁶³⁰ is an apocalyptic number.

121630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121630 is a deficient number, since it is larger than the sum of its proper divisors (97322).

121630 is a wasteful number, since it uses less digits than its factorization.

121630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121630 is about 348.7549282806. The cubic root of 121630 is about 49.5465670684.

Adding to 121630 its reverse (36121), we get a palindrome (157751).

The spelling of 121630 in words is "one hundred twenty-one thousand, six hundred thirty".