121420406 has 8 divisors (see below), whose sum is σ = 182386080. Its totient is φ = 60625048.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420406 is 604024121.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 40781 + ... + 43656.

It is an arithmetic number, because the mean of its divisors is an integer number (22798260).

Almost surely, 2^121420406 is an apocalyptic number.

121420406 is a deficient number, since it is larger than the sum of its proper divisors (60965674).

121420406 is an equidigital number, since it uses as much as digits as its factorization.

121420406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85158.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121420406 is about 11019.0927938737. The cubic root of 121420406 is about 495.1809099648.

Adding to 121420406 its reverse (604024121), we get a palindrome (725444527).

The spelling of 121420406 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred six".