74284143 has 16 divisors (see below), whose sum is σ = 100763136. Its totient is φ = 48669120.

The previous prime is 74284139. The next prime is 74284159. The reversal of 74284143 is 34148247.

It is not a de Polignac number, because 74284143 - 2² = 74284139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74284163) 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, 93996 + ... + 94782.

It is an arithmetic number, because the mean of its divisors is an integer number (6297696).

Almost surely, 2^74284143 is an apocalyptic number.

74284143 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

74284143 is a deficient number, since it is larger than the sum of its proper divisors (26478993).

74284143 is a wasteful number, since it uses less digits than its factorization.

74284143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294.

The product of its digits is 21504, while the sum is 33.

The square root of 74284143 is about 8618.8249199064. The cubic root of 74284143 is about 420.3703139878.

The spelling of 74284143 in words is "seventy-four million, two hundred eighty-four thousand, one hundred forty-three".