42251907 has 4 divisors (see below), whose sum is σ = 56335880. Its totient is φ = 28167936.

The previous prime is 42251903. The next prime is 42251917. The reversal of 42251907 is 70915224.

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

It is not a de Polignac number, because 42251907 - 2² = 42251903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42251903) 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, 7041982 + ... + 7041987.

It is an arithmetic number, because the mean of its divisors is an integer number (14083970).

Almost surely, 2^42251907 is an apocalyptic number.

42251907 is a deficient number, since it is larger than the sum of its proper divisors (14083973).

42251907 is a wasteful number, since it uses less digits than its factorization.

42251907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083972.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 42251907 is about 6500.1466906525. The cubic root of 42251907 is about 348.2962284803.

The spelling of 42251907 in words is "forty-two million, two hundred fifty-one thousand, nine hundred seven".