42731043 has 4 divisors (see below), whose sum is σ = 56974728. Its totient is φ = 28487360.

The previous prime is 42731011. The next prime is 42731083. The reversal of 42731043 is 34013724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42731043 - 2⁵ = 42731011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42731083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7121838 + ... + 7121843.

It is an arithmetic number, because the mean of its divisors is an integer number (14243682).

Almost surely, 2^42731043 is an apocalyptic number.

42731043 is a deficient number, since it is larger than the sum of its proper divisors (14243685).

42731043 is a wasteful number, since it uses less digits than its factorization.

42731043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243684.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 42731043 is about 6536.8985765422. The cubic root of 42731043 is about 349.6078410401.

Adding to 42731043 its reverse (34013724), we get a palindrome (76744767).

The spelling of 42731043 in words is "forty-two million, seven hundred thirty-one thousand, forty-three".