121563265 has 4 divisors (see below), whose sum is σ = 145875924. Its totient is φ = 97250608.

The previous prime is 121563263. The next prime is 121563269. The reversal of 121563265 is 562365121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562365121 = 6679 ⋅84199.

It can be written as a sum of positive squares in 2 ways, for example, as 35426304 + 86136961 = 5952^2 + 9281^2 .

It is a cyclic number.

It is not a de Polignac number, because 121563265 - 2¹ = 121563263 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121563263) 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, 12156322 + ... + 12156331.

It is an arithmetic number, because the mean of its divisors is an integer number (36468981).

Almost surely, 2^121563265 is an apocalyptic number.

It is an amenable number.

121563265 is a deficient number, since it is larger than the sum of its proper divisors (24312659).

121563265 is an equidigital number, since it uses as much as digits as its factorization.

121563265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24312658.

The product of its digits is 10800, while the sum is 31.

The square root of 121563265 is about 11025.5732277283. The cubic root of 121563265 is about 495.3750380257.

The spelling of 121563265 in words is "one hundred twenty-one million, five hundred sixty-three thousand, two hundred sixty-five".