42907 has 4 divisors (see below), whose sum is σ = 43416. Its totient is φ = 42400.

The previous prime is 42901. The next prime is 42923. The reversal of 42907 is 70924.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42907 - 2³ = 42899 is a prime.

It is a Duffinian number.

42907 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (42901) 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, 94 + ... + 307.

It is an arithmetic number, because the mean of its divisors is an integer number (10854).

2⁴²⁹⁰⁷ is an apocalyptic number.

42907 is a deficient number, since it is larger than the sum of its proper divisors (509).

42907 is a wasteful number, since it uses less digits than its factorization.

42907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 42907 is about 207.1400492421. The cubic root of 42907 is about 35.0087053176.

It can be divided in two parts, 42 and 907, that added together give a palindrome (949).

The spelling of 42907 in words is "forty-two thousand, nine hundred seven".