121690841 has 8 divisors (see below), whose sum is σ = 126177024. Its totient is φ = 117239760.

The previous prime is 121690837. The next prime is 121690843. The reversal of 121690841 is 148096121.

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 121690841 - 2² = 121690837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121690798 and 121690807.

It is not an unprimeable number, because it can be changed into a prime (121690843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1610 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (15772128).

Almost surely, 2^121690841 is an apocalyptic number.

It is an amenable number.

121690841 is a deficient number, since it is larger than the sum of its proper divisors (4486183).

121690841 is a wasteful number, since it uses less digits than its factorization.

121690841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17551.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 121690841 is about 11031.3571694511. The cubic root of 121690841 is about 495.5482698289.

The spelling of 121690841 in words is "one hundred twenty-one million, six hundred ninety thousand, eight hundred forty-one".