121516 has 12 divisors (see below), whose sum is σ = 225288. Its totient is φ = 57152.

The previous prime is 121507. The next prime is 121523. The reversal of 121516 is 615121.

It is a happy number.

It is a super-2 number, since 2×121516² = 29532276512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121516.

It is an unprimeable number.

121516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (18774).

2¹²¹⁵¹⁶ is an apocalyptic number.

It is an amenable number.

121516 is a deficient number, since it is larger than the sum of its proper divisors (103772).

121516 is a wasteful number, since it uses less digits than its factorization.

121516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808 (or 1806 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 121516 is about 348.5914514156. The cubic root of 121516 is about 49.5310827465.

Adding to 121516 its reverse (615121), we get a palindrome (736637).

The spelling of 121516 in words is "one hundred twenty-one thousand, five hundred sixteen".