121530406 has 8 divisors (see below), whose sum is σ = 182344824. Its totient is φ = 60748800.

The previous prime is 121530397. The next prime is 121530419. The reversal of 121530406 is 604035121.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5926 + ... + 16678.

It is an arithmetic number, because the mean of its divisors is an integer number (22793103).

Almost surely, 2^121530406 is an apocalyptic number.

121530406 is a deficient number, since it is larger than the sum of its proper divisors (60814418).

121530406 is a wasteful number, since it uses less digits than its factorization.

121530406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16406.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 121530406 is about 11024.0830004132. The cubic root of 121530406 is about 495.3304001021.

Adding to 121530406 its reverse (604035121), we get a palindrome (725565527).

The spelling of 121530406 in words is "one hundred twenty-one million, five hundred thirty thousand, four hundred six".