121170639 has 8 divisors (see below), whose sum is σ = 163972480. Its totient is φ = 79574616.

The previous prime is 121170629. The next prime is 121170641. The reversal of 121170639 is 936071121.

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

It is not a de Polignac number, because 121170639 - 2⁵ = 121170607 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 (121170629) 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, 301219 + ... + 301620.

It is an arithmetic number, because the mean of its divisors is an integer number (20496560).

Almost surely, 2^121170639 is an apocalyptic number.

121170639 is a deficient number, since it is larger than the sum of its proper divisors (42801841).

121170639 is an equidigital number, since it uses as much as digits as its factorization.

121170639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602909.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 121170639 is about 11007.7535855414. The cubic root of 121170639 is about 494.8411407382.

The spelling of 121170639 in words is "one hundred twenty-one million, one hundred seventy thousand, six hundred thirty-nine".