121775670 has 64 divisors (see below), whose sum is σ = 326845440. Its totient is φ = 32262624.

The previous prime is 121775663. The next prime is 121775671. The reversal of 121775670 is 76577121.

121775670 is a `hidden beast` number, since 1 + 21 + 77 + 567 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121775671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42627 + ... + 45393.

It is an arithmetic number, because the mean of its divisors is an integer number (5106960).

Almost surely, 2^121775670 is an apocalyptic number.

121775670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121775670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163422720).

121775670 is an abundant number, since it is smaller than the sum of its proper divisors (205069770).

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

121775670 is a wasteful number, since it uses less digits than its factorization.

121775670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 121775670 is about 11035.2014027837. The cubic root of 121775670 is about 495.6633896956.

The spelling of 121775670 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, six hundred seventy".