121389504 has 112 divisors (see below), whose sum is σ = 333573120. Its totient is φ = 38937600.

The previous prime is 121389431. The next prime is 121389509. The reversal of 121389504 is 405983121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121389509) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 803829 + ... + 803979.

Almost surely, 2^121389504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121389504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166786560).

121389504 is an abundant number, since it is smaller than the sum of its proper divisors (212183616).

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

121389504 is a wasteful number, since it uses less digits than its factorization.

121389504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 121389504 is about 11017.6905020971. The cubic root of 121389504 is about 495.1388978646.

The spelling of 121389504 in words is "one hundred twenty-one million, three hundred eighty-nine thousand, five hundred four".