42550001 has 8 divisors (see below), whose sum is σ = 46575144. Its totient is φ = 38632320.

The previous prime is 42549973. The next prime is 42550007. The reversal of 42550001 is 10005524.

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 42510400 = 199^2 + 6520^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42550001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42550007) 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 7 ways as a sum of consecutive naturals, for example, 26036 + ... + 27621.

It is an arithmetic number, because the mean of its divisors is an integer number (5821893).

Almost surely, 2^42550001 is an apocalyptic number.

It is an amenable number.

42550001 is a deficient number, since it is larger than the sum of its proper divisors (4025143).

42550001 is a wasteful number, since it uses less digits than its factorization.

42550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53731.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 42550001 is about 6523.0361795716. The cubic root of 42550001 is about 349.1134050169.

Adding to 42550001 its reverse (10005524), we get a palindrome (52555525).

The spelling of 42550001 in words is "forty-two million, five hundred fifty thousand, one".