121452547 has 4 divisors (see below), whose sum is σ = 121524760. Its totient is φ = 121380336.

The previous prime is 121452533. The next prime is 121452557. The reversal of 121452547 is 745254121.

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

It is a cyclic number.

It is not a de Polignac number, because 121452547 - 2²³ = 113063939 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121452517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33522 + ... + 36967.

It is an arithmetic number, because the mean of its divisors is an integer number (30381190).

Almost surely, 2^121452547 is an apocalyptic number.

121452547 is a deficient number, since it is larger than the sum of its proper divisors (72213).

121452547 is an equidigital number, since it uses as much as digits as its factorization.

121452547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72212.

The product of its digits is 11200, while the sum is 31.

The square root of 121452547 is about 11020.5511205202. The cubic root of 121452547 is about 495.2245989570.

The spelling of 121452547 in words is "one hundred twenty-one million, four hundred fifty-two thousand, five hundred forty-seven".