42478201 has 4 divisors (see below), whose sum is σ = 43112272. Its totient is φ = 41844132.

The previous prime is 42478193. The next prime is 42478211. The reversal of 42478201 is 10287424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42478201 - 2³ = 42478193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42478201.

It is not an unprimeable number, because it can be changed into a prime (42478211) 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, 316935 + ... + 317068.

It is an arithmetic number, because the mean of its divisors is an integer number (10778068).

Almost surely, 2^42478201 is an apocalyptic number.

It is an amenable number.

42478201 is a deficient number, since it is larger than the sum of its proper divisors (634071).

42478201 is an equidigital number, since it uses as much as digits as its factorization.

42478201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634070.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42478201 is about 6517.5302837808. The cubic root of 42478201 is about 348.9169267221.

The spelling of 42478201 in words is "forty-two million, four hundred seventy-eight thousand, two hundred one".