42147907 has 4 divisors (see below), whose sum is σ = 42253416. Its totient is φ = 42042400.

The previous prime is 42147893. The next prime is 42147929. The reversal of 42147907 is 70974124.

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-42147907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42147977) 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, 52153 + ... + 52954.

It is an arithmetic number, because the mean of its divisors is an integer number (10563354).

Almost surely, 2^42147907 is an apocalyptic number.

42147907 is a deficient number, since it is larger than the sum of its proper divisors (105509).

42147907 is a wasteful number, since it uses less digits than its factorization.

42147907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105508.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 42147907 is about 6492.1419423793. The cubic root of 42147907 is about 348.0102250706.

It can be divided in two parts, 4214 and 7907, that added together give a palindrome (12121).

The spelling of 42147907 in words is "forty-two million, one hundred forty-seven thousand, nine hundred seven".