121472243 has 4 divisors (see below), whose sum is σ = 122935848. Its totient is φ = 120008640.

The previous prime is 121472207. The next prime is 121472257. The reversal of 121472243 is 342274121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342274121 = 7 ⋅48896303.

It is a cyclic number.

It is not a de Polignac number, because 121472243 - 2¹⁰ = 121471219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121472843) 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, 731678 + ... + 731843.

It is an arithmetic number, because the mean of its divisors is an integer number (30733962).

Almost surely, 2^121472243 is an apocalyptic number.

121472243 is a deficient number, since it is larger than the sum of its proper divisors (1463605).

121472243 is an equidigital number, since it uses as much as digits as its factorization.

121472243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463604.

The product of its digits is 2688, while the sum is 26.

The square root of 121472243 is about 11021.4446875171. Note that the first 3 decimals coincide. The cubic root of 121472243 is about 495.2513677561.

The spelling of 121472243 in words is "one hundred twenty-one million, four hundred seventy-two thousand, two hundred forty-three".