121172407 has 8 divisors (see below), whose sum is σ = 122303984. Its totient is φ = 120045888.

The previous prime is 121172383. The next prime is 121172419. The reversal of 121172407 is 704271121.

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

It is a cyclic number.

It is not a de Polignac number, because 121172407 - 2⁷ = 121172279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121172437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59803 + ... + 61795.

It is an arithmetic number, because the mean of its divisors is an integer number (15287998).

Almost surely, 2^121172407 is an apocalyptic number.

121172407 is a deficient number, since it is larger than the sum of its proper divisors (1131577).

121172407 is a wasteful number, since it uses less digits than its factorization.

121172407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 121172407 is about 11007.8338922787. The cubic root of 121172407 is about 494.8435474678.

The spelling of 121172407 in words is "one hundred twenty-one million, one hundred seventy-two thousand, four hundred seven".