42840007 has 16 divisors (see below), whose sum is σ = 51287040. Its totient is φ = 35053656.

The previous prime is 42839999. The next prime is 42840067. The reversal of 42840007 is 70004824.

It is not a de Polignac number, because 42840007 - 2³ = 42839999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84918 + ... + 85420.

It is an arithmetic number, because the mean of its divisors is an integer number (3205440).

Almost surely, 2^42840007 is an apocalyptic number.

42840007 is a deficient number, since it is larger than the sum of its proper divisors (8447033).

42840007 is an frugal number, since it uses more digits than its factorization.

42840007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 42840007 is about 6545.2278035222. The cubic root of 42840007 is about 349.9047550359.

The spelling of 42840007 in words is "forty-two million, eight hundred forty thousand, seven".