121604424 has 64 divisors (see below), whose sum is σ = 316008000. Its totient is φ = 38949120.

The previous prime is 121604423. The next prime is 121604437. The reversal of 121604424 is 424406121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 121604394 and 121604403.

It is not an unprimeable number, because it can be changed into a prime (121604423) 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, 263554 + ... + 264014.

It is an arithmetic number, because the mean of its divisors is an integer number (4937625).

Almost surely, 2^121604424 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 121604424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158004000).

121604424 is an abundant number, since it is smaller than the sum of its proper divisors (194403576).

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

121604424 is a wasteful number, since it uses less digits than its factorization.

121604424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 121604424 is about 11027.4395940309. The cubic root of 121604424 is about 495.4309398930.

The spelling of 121604424 in words is "one hundred twenty-one million, six hundred four thousand, four hundred twenty-four".