121544004 has 24 divisors (see below), whose sum is σ = 283782240. Its totient is φ = 40489024.

The previous prime is 121543997. The next prime is 121544009. The reversal of 121544004 is 400445121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121544009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32032 + ... + 35624.

It is an arithmetic number, because the mean of its divisors is an integer number (11824260).

Almost surely, 2^121544004 is an apocalyptic number.

It is an amenable number.

121544004 is an abundant number, since it is smaller than the sum of its proper divisors (162238236).

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

121544004 is a wasteful number, since it uses less digits than its factorization.

121544004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6419 (or 6417 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121544004 is about 11024.6997238020. The cubic root of 121544004 is about 495.3488735355.

Adding to 121544004 its reverse (400445121), we get a palindrome (521989125).

The spelling of 121544004 in words is "one hundred twenty-one million, five hundred forty-four thousand, four".