42043870 has 24 divisors (see below), whose sum is σ = 83186712. Its totient is φ = 15288240.

The previous prime is 42043847. The next prime is 42043871. The reversal of 42043870 is 7834024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42043871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16164 + ... + 18583.

It is an arithmetic number, because the mean of its divisors is an integer number (3466113).

Almost surely, 2^42043870 is an apocalyptic number.

42043870 is a deficient number, since it is larger than the sum of its proper divisors (41142842).

42043870 is a wasteful number, since it uses less digits than its factorization.

42043870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34776 (or 34765 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 42043870 is about 6484.1244590153. The cubic root of 42043870 is about 347.7236487945.

Adding to 42043870 its reverse (7834024), we get a palindrome (49877894).

The spelling of 42043870 in words is "forty-two million, forty-three thousand, eight hundred seventy".