121403984 has 20 divisors (see below), whose sum is σ = 253314516. Its totient is φ = 56032512.

The previous prime is 121403983. The next prime is 121404001. The reversal of 121403984 is 489304121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40043584 + 81360400 = 6328^2 + 9020^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121403984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291629 + ... + 292044.

Almost surely, 2^121403984 is an apocalyptic number.

It is an amenable number.

121403984 is an abundant number, since it is smaller than the sum of its proper divisors (131910532).

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

121403984 is a wasteful number, since it uses less digits than its factorization.

121403984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583694 (or 583688 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 121403984 is about 11018.3476075136. The cubic root of 121403984 is about 495.1585847017.

The spelling of 121403984 in words is "one hundred twenty-one million, four hundred three thousand, nine hundred eighty-four".