121174561 has 4 divisors (see below), whose sum is σ = 121198000. Its totient is φ = 121151124.

The previous prime is 121174553. The next prime is 121174577. The reversal of 121174561 is 165471121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121174561 - 2³ = 121174553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121174541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171 + ... + 15568.

It is an arithmetic number, because the mean of its divisors is an integer number (30299500).

Almost surely, 2^121174561 is an apocalyptic number.

It is an amenable number.

121174561 is a deficient number, since it is larger than the sum of its proper divisors (23439).

121174561 is an equidigital number, since it uses as much as digits as its factorization.

121174561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23438.

The product of its digits is 1680, while the sum is 28.

The square root of 121174561 is about 11007.9317312563. The cubic root of 121174561 is about 494.8464796169.

The spelling of 121174561 in words is "one hundred twenty-one million, one hundred seventy-four thousand, five hundred sixty-one".