42421507 has 4 divisors (see below), whose sum is σ = 42675696. Its totient is φ = 42167320.

The previous prime is 42421493. The next prime is 42421553. The reversal of 42421507 is 70512424.

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

It is a cyclic number.

It is not a de Polignac number, because 42421507 - 2¹¹ = 42419459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42481507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126844 + ... + 127177.

It is an arithmetic number, because the mean of its divisors is an integer number (10668924).

Almost surely, 2^42421507 is an apocalyptic number.

42421507 is a deficient number, since it is larger than the sum of its proper divisors (254189).

42421507 is a wasteful number, since it uses less digits than its factorization.

42421507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254188.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 42421507 is about 6513.1794847064. The cubic root of 42421507 is about 348.7616290021.

The spelling of 42421507 in words is "forty-two million, four hundred twenty-one thousand, five hundred seven".