121424004 has 36 divisors (see below), whose sum is σ = 330544396. Its totient is φ = 37361088.

The previous prime is 121423999. The next prime is 121424021. The reversal of 121424004 is 400424121.

It can be written as a sum of positive squares in 2 ways, for example, as 58982400 + 62441604 = 7680^2 + 7902^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129259 + ... + 130194.

Almost surely, 2^121424004 is an apocalyptic number.

It is an amenable number.

121424004 is an abundant number, since it is smaller than the sum of its proper divisors (209120392).

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

121424004 is a wasteful number, since it uses less digits than its factorization.

121424004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259476 (or 259471 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121424004 is about 11019.2560547434. The cubic root of 121424004 is about 495.1858010793.

Adding to 121424004 its reverse (400424121), we get a palindrome (521848125).

The spelling of 121424004 in words is "one hundred twenty-one million, four hundred twenty-four thousand, four".