121657273 has 4 divisors (see below), whose sum is σ = 121716340. Its totient is φ = 121598208.

The previous prime is 121657271. The next prime is 121657279. The reversal of 121657273 is 372756121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2999824 + 118657449 = 1732^2 + 10893^2 .

It is a cyclic number.

It is not a de Polignac number, because 121657273 - 2¹ = 121657271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121657271) 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, 26328 + ... + 30601.

It is an arithmetic number, because the mean of its divisors is an integer number (30429085).

Almost surely, 2^121657273 is an apocalyptic number.

It is an amenable number.

121657273 is a deficient number, since it is larger than the sum of its proper divisors (59067).

121657273 is an equidigital number, since it uses as much as digits as its factorization.

121657273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59066.

The product of its digits is 17640, while the sum is 34.

The square root of 121657273 is about 11029.8355835434. The cubic root of 121657273 is about 495.5027005432.

The spelling of 121657273 in words is "one hundred twenty-one million, six hundred fifty-seven thousand, two hundred seventy-three".