42457239 has 24 divisors (see below), whose sum is σ = 67721472. Its totient is φ = 25416720.

The previous prime is 42457237. The next prime is 42457253. The reversal of 42457239 is 93275424.

It is not a de Polignac number, because 42457239 - 2¹ = 42457237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42457237) 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, 5634 + ... + 10800.

It is an arithmetic number, because the mean of its divisors is an integer number (2821728).

Almost surely, 2^42457239 is an apocalyptic number.

42457239 is a deficient number, since it is larger than the sum of its proper divisors (25264233).

42457239 is a wasteful number, since it uses less digits than its factorization.

42457239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267 (or 5264 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 42457239 is about 6515.9219608586. The cubic root of 42457239 is about 348.8595231608.

The spelling of 42457239 in words is "forty-two million, four hundred fifty-seven thousand, two hundred thirty-nine".