121718453 has 8 divisors (see below), whose sum is σ = 128988288. Its totient is φ = 114460864.

The previous prime is 121718437. The next prime is 121718459. The reversal of 121718453 is 354817121.

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

It is not a de Polignac number, because 121718453 - 2⁴ = 121718437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121718459) 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 7 ways as a sum of consecutive naturals, for example, 24650 + ... + 29172.

It is an arithmetic number, because the mean of its divisors is an integer number (16123536).

Almost surely, 2^121718453 is an apocalyptic number.

It is an amenable number.

121718453 is a deficient number, since it is larger than the sum of its proper divisors (7269835).

121718453 is a wasteful number, since it uses less digits than its factorization.

121718453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123.

The product of its digits is 6720, while the sum is 32.

The square root of 121718453 is about 11032.6086217177. The cubic root of 121718453 is about 495.5857474345.

The spelling of 121718453 in words is "one hundred twenty-one million, seven hundred eighteen thousand, four hundred fifty-three".