43142643 has 6 divisors (see below), whose sum is σ = 62317164. Its totient is φ = 28761756.

The previous prime is 43142621. The next prime is 43142647. The reversal of 43142643 is 34624134.

43142643 is a `hidden beast` number, since 4 + 3 + 14 + 2 + 643 = 666.

It is not a de Polignac number, because 43142643 - 2⁶ = 43142579 is a prime.

It is a super-2 number, since 2×43142643² = 3722575290050898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43142647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2396805 + ... + 2396822.

It is an arithmetic number, because the mean of its divisors is an integer number (10386194).

Almost surely, 2^43142643 is an apocalyptic number.

43142643 is a deficient number, since it is larger than the sum of its proper divisors (19174521).

43142643 is a wasteful number, since it uses less digits than its factorization.

43142643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793633 (or 4793630 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 43142643 is about 6568.3059459803. The cubic root of 43142643 is about 350.7267700996.

Adding to 43142643 its reverse (34624134), we get a palindrome (77766777).

The spelling of 43142643 in words is "forty-three million, one hundred forty-two thousand, six hundred forty-three".