121794565 has 8 divisors (see below), whose sum is σ = 150103800. Its totient is φ = 94802112.

The previous prime is 121794553. The next prime is 121794581. The reversal of 121794565 is 565497121.

It can be written as a sum of positive squares in 4 ways, for example, as 4137156 + 117657409 = 2034^2 + 10847^2 .

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 121794565 - 2¹³ = 121786373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328990 + ... + 329359.

It is an arithmetic number, because the mean of its divisors is an integer number (18762975).

Almost surely, 2^121794565 is an apocalyptic number.

It is an amenable number.

121794565 is a deficient number, since it is larger than the sum of its proper divisors (28309235).

121794565 is an equidigital number, since it uses as much as digits as its factorization.

121794565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658391.

The product of its digits is 75600, while the sum is 40.

The square root of 121794565 is about 11036.0574935074. The cubic root of 121794565 is about 495.6890244698.

The spelling of 121794565 in words is "one hundred twenty-one million, seven hundred ninety-four thousand, five hundred sixty-five".