121273243 has 8 divisors (see below), whose sum is σ = 149259488. Its totient is φ = 95952384.

The previous prime is 121273241. The next prime is 121273247. The reversal of 121273243 is 342372121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121273243 - 2¹ = 121273241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121273241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666246 + ... + 666427.

It is an arithmetic number, because the mean of its divisors is an integer number (18657436).

Almost surely, 2^121273243 is an apocalyptic number.

121273243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121273243 is a deficient number, since it is larger than the sum of its proper divisors (27986245).

121273243 is a wasteful number, since it uses less digits than its factorization.

121273243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332693.

The product of its digits is 2016, while the sum is 25.

The square root of 121273243 is about 11012.4131324610. The cubic root of 121273243 is about 494.9807740041.

The spelling of 121273243 in words is "one hundred twenty-one million, two hundred seventy-three thousand, two hundred forty-three".