121290424 has 8 divisors (see below), whose sum is σ = 227419560. Its totient is φ = 60645208.

The previous prime is 121290397. The next prime is 121290437. The reversal of 121290424 is 424092121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×121290424² = 29422733908199552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7580644 + ... + 7580659.

It is an arithmetic number, because the mean of its divisors is an integer number (28427445).

Almost surely, 2^121290424 is an apocalyptic number.

It is an amenable number.

121290424 is a deficient number, since it is larger than the sum of its proper divisors (106129136).

121290424 is a wasteful number, since it uses less digits than its factorization.

121290424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15161309 (or 15161305 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 121290424 is about 11013.1931790921. The cubic root of 121290424 is about 495.0041478413.

The spelling of 121290424 in words is "one hundred twenty-one million, two hundred ninety thousand, four hundred twenty-four".