42043257 has 24 divisors (see below), whose sum is σ = 65145600. Its totient is φ = 26047008.

The previous prime is 42043249. The next prime is 42043259. The reversal of 42043257 is 75234024.

It is not a de Polignac number, because 42043257 - 2³ = 42043249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42043257.

It is not an unprimeable number, because it can be changed into a prime (42043259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6744 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (2714400).

Almost surely, 2^42043257 is an apocalyptic number.

It is an amenable number.

42043257 is a deficient number, since it is larger than the sum of its proper divisors (23102343).

42043257 is a wasteful number, since it uses less digits than its factorization.

42043257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717 (or 4714 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 42043257 is about 6484.0771895467. The cubic root of 42043257 is about 347.7219588483.

The spelling of 42043257 in words is "forty-two million, forty-three thousand, two hundred fifty-seven".