340405143 has 16 divisors (see below), whose sum is σ = 501999456. Its totient is φ = 203817600.

The previous prime is 340405123. The next prime is 340405201. The reversal of 340405143 is 341504043.

It is not a de Polignac number, because 340405143 - 2¹⁷ = 340274071 is a prime.

It is a super-2 number, since 2×340405143² = 231751322761700898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340405123) 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, 116508 + ... + 119393.

It is an arithmetic number, because the mean of its divisors is an integer number (31374966).

Almost surely, 2^340405143 is an apocalyptic number.

340405143 is a deficient number, since it is larger than the sum of its proper divisors (161594313).

340405143 is a wasteful number, since it uses less digits than its factorization.

340405143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235954.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 340405143 is about 18450.0716258772. The cubic root of 340405143 is about 698.2303209783.

Adding to 340405143 its reverse (341504043), we get a palindrome (681909186).

The spelling of 340405143 in words is "three hundred forty million, four hundred five thousand, one hundred forty-three".