121425243 has 4 divisors (see below), whose sum is σ = 161900328. Its totient is φ = 80950160.

The previous prime is 121425217. The next prime is 121425277. The reversal of 121425243 is 342524121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342524121 = 3 ⋅114174707.

It is a cyclic number.

It is not a de Polignac number, because 121425243 - 2⁶ = 121425179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121425043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20237538 + ... + 20237543.

It is an arithmetic number, because the mean of its divisors is an integer number (40475082).

Almost surely, 2^121425243 is an apocalyptic number.

121425243 is a deficient number, since it is larger than the sum of its proper divisors (40475085).

121425243 is an equidigital number, since it uses as much as digits as its factorization.

121425243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40475084.

The product of its digits is 1920, while the sum is 24.

The square root of 121425243 is about 11019.3122743663. The cubic root of 121425243 is about 495.1874853512.

Adding to 121425243 its reverse (342524121), we get a palindrome (463949364).

The spelling of 121425243 in words is "one hundred twenty-one million, four hundred twenty-five thousand, two hundred forty-three".