121677156 has 36 divisors (see below), whose sum is σ = 318181500. Its totient is φ = 39160128.

The previous prime is 121677137. The next prime is 121677161. The reversal of 121677156 is 651776121.

121677156 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57517056 + 64160100 = 7584^2 + 8010^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

121677156 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 121677156.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 57231 + ... + 59318.

It is an arithmetic number, because the mean of its divisors is an integer number (8838375).

Almost surely, 2^121677156 is an apocalyptic number.

It is an amenable number.

121677156 is an abundant number, since it is smaller than the sum of its proper divisors (196504344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121677156 is a wasteful number, since it uses less digits than its factorization.

121677156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116588 (or 116583 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 121677156 is about 11030.7368747514. The cubic root of 121677156 is about 495.5296931575.

The spelling of 121677156 in words is "one hundred twenty-one million, six hundred seventy-seven thousand, one hundred fifty-six".