42240207 has 4 divisors (see below), whose sum is σ = 56320280. Its totient is φ = 28160136.

The previous prime is 42240181. The next prime is 42240221. The reversal of 42240207 is 70204224.

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

It is not a de Polignac number, because 42240207 - 2¹² = 42236111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240307) 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, 7040032 + ... + 7040037.

It is an arithmetic number, because the mean of its divisors is an integer number (14080070).

Almost surely, 2^42240207 is an apocalyptic number.

42240207 is a deficient number, since it is larger than the sum of its proper divisors (14080073).

42240207 is a wasteful number, since it uses less digits than its factorization.

42240207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080072.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 42240207 is about 6499.2466486509. The cubic root of 42240207 is about 348.2640765424.

The spelling of 42240207 in words is "forty-two million, two hundred forty thousand, two hundred seven".