121374543 has 16 divisors (see below), whose sum is σ = 172876896. Its totient is φ = 75479040.

The previous prime is 121374529. The next prime is 121374553. The reversal of 121374543 is 345473121.

It is a happy number.

It is not a de Polignac number, because 121374543 - 2⁵ = 121374511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121374543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121374503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4768 + ... + 16293.

It is an arithmetic number, because the mean of its divisors is an integer number (10804806).

Almost surely, 2^121374543 is an apocalyptic number.

121374543 is a deficient number, since it is larger than the sum of its proper divisors (51502353).

121374543 is a wasteful number, since it uses less digits than its factorization.

121374543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21194.

The product of its digits is 10080, while the sum is 30.

The square root of 121374543 is about 11017.0115276331. The cubic root of 121374543 is about 495.1185554210.

The spelling of 121374543 in words is "one hundred twenty-one million, three hundred seventy-four thousand, five hundred forty-three".