42457507 has 4 divisors (see below), whose sum is σ = 43827136. Its totient is φ = 41087880.

The previous prime is 42457501. The next prime is 42457529. The reversal of 42457507 is 70575424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42457507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42457501) 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, 684768 + ... + 684829.

It is an arithmetic number, because the mean of its divisors is an integer number (10956784).

Almost surely, 2^42457507 is an apocalyptic number.

42457507 is a deficient number, since it is larger than the sum of its proper divisors (1369629).

42457507 is a wasteful number, since it uses less digits than its factorization.

42457507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369628.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 42457507 is about 6515.9425258362. The cubic root of 42457507 is about 348.8602571869.

The spelling of 42457507 in words is "forty-two million, four hundred fifty-seven thousand, five hundred seven".