121546789 has 16 divisors (see below), whose sum is σ = 156102912. Its totient is φ = 91986048.

The previous prime is 121546783. The next prime is 121546807. The reversal of 121546789 is 987645121.

It is not a de Polignac number, because 121546789 - 2⁷ = 121546661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121546783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26944 + ... + 31129.

It is an arithmetic number, because the mean of its divisors is an integer number (9756432).

Almost surely, 2^121546789 is an apocalyptic number.

It is an amenable number.

121546789 is a deficient number, since it is larger than the sum of its proper divisors (34556123).

121546789 is a wasteful number, since it uses less digits than its factorization.

121546789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58116.

The product of its digits is 120960, while the sum is 43.

The square root of 121546789 is about 11024.8260303734. The cubic root of 121546789 is about 495.3526569007.

The spelling of 121546789 in words is "one hundred twenty-one million, five hundred forty-six thousand, seven hundred eighty-nine".