42051543 has 4 divisors (see below), whose sum is σ = 56068728. Its totient is φ = 28034360.

The previous prime is 42051539. The next prime is 42051547. The reversal of 42051543 is 34515024.

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

It is an interprime number because it is at equal distance from previous prime (42051539) and next prime (42051547).

It is a cyclic number.

It is not a de Polignac number, because 42051543 - 2² = 42051539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051547) 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, 7008588 + ... + 7008593.

It is an arithmetic number, because the mean of its divisors is an integer number (14017182).

Almost surely, 2^42051543 is an apocalyptic number.

42051543 is a deficient number, since it is larger than the sum of its proper divisors (14017185).

42051543 is a wasteful number, since it uses less digits than its factorization.

42051543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14017184.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42051543 is about 6484.7161078955. The cubic root of 42051543 is about 347.7448006792.

Adding to 42051543 its reverse (34515024), we get a palindrome (76566567).

The spelling of 42051543 in words is "forty-two million, fifty-one thousand, five hundred forty-three".