340042143 has 32 divisors (see below), whose sum is σ = 572507136. Its totient is φ = 174924288.

The previous prime is 340042111. The next prime is 340042159. The reversal of 340042143 is 341240043.

It is not a de Polignac number, because 340042143 - 2⁵ = 340042111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340042163) 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 31 ways as a sum of consecutive naturals, for example, 12496 + ... + 28917.

It is an arithmetic number, because the mean of its divisors is an integer number (17890848).

Almost surely, 2^340042143 is an apocalyptic number.

340042143 is a deficient number, since it is larger than the sum of its proper divisors (232464993).

340042143 is a wasteful number, since it uses less digits than its factorization.

340042143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41463.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340042143 is about 18440.2316417121. The cubic root of 340042143 is about 697.9820405994.

Adding to 340042143 its reverse (341240043), we get a palindrome (681282186).

The spelling of 340042143 in words is "three hundred forty million, forty-two thousand, one hundred forty-three".