42974543 has 2 divisors, whose sum is σ = 42974544. Its totient is φ = 42974542.

The previous prime is 42974539. The next prime is 42974593. The reversal of 42974543 is 34547924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42974543 - 2² = 42974539 is a prime.

It is a super-2 number, since 2×42974543² = 3693622692117698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42974497 and 42974506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42974513) 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 as a sum of consecutive naturals, namely, 21487271 + 21487272.

It is an arithmetic number, because the mean of its divisors is an integer number (21487272).

Almost surely, 2^42974543 is an apocalyptic number.

42974543 is a deficient number, since it is larger than the sum of its proper divisors (1).

42974543 is an equidigital number, since it uses as much as digits as its factorization.

42974543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 42974543 is about 6555.4971588736. The cubic root of 42974543 is about 350.2706559532.

The spelling of 42974543 in words is "forty-two million, nine hundred seventy-four thousand, five hundred forty-three".