121254143 has 16 divisors (see below), whose sum is σ = 131975520. Its totient is φ = 111010176.

The previous prime is 121254131. The next prime is 121254151. The reversal of 121254143 is 341452121.

It is a cyclic number.

It is not a de Polignac number, because 121254143 - 2⁴ = 121254127 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121254103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121121 + ... + 122117.

It is an arithmetic number, because the mean of its divisors is an integer number (8248470).

Almost surely, 2^121254143 is an apocalyptic number.

121254143 is a deficient number, since it is larger than the sum of its proper divisors (10721377).

121254143 is a wasteful number, since it uses less digits than its factorization.

121254143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its digits is 960, while the sum is 23.

The square root of 121254143 is about 11011.5458951048. The cubic root of 121254143 is about 494.9547868781.

It can be divided in two parts, 1212 and 54143, that added together give a palindrome (55355).

The spelling of 121254143 in words is "one hundred twenty-one million, two hundred fifty-four thousand, one hundred forty-three".