121172406 has 8 divisors (see below), whose sum is σ = 242344824. Its totient is φ = 40390800.

The previous prime is 121172383. The next prime is 121172419. The reversal of 121172406 is 604271121.

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

121172406 is an admirable number.

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, 10097695 + ... + 10097706.

It is an arithmetic number, because the mean of its divisors is an integer number (30293103).

Almost surely, 2^121172406 is an apocalyptic number.

121172406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121172406 is a wasteful number, since it uses less digits than its factorization.

121172406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20195406.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 121172406 is about 11007.8338468565. The cubic root of 121172406 is about 494.8435461065.

The spelling of 121172406 in words is "one hundred twenty-one million, one hundred seventy-two thousand, four hundred six".