42550457 has 4 divisors (see below), whose sum is σ = 42569700. Its totient is φ = 42531216.

The previous prime is 42550451. The next prime is 42550493. The reversal of 42550457 is 75405524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21196816 + 21353641 = 4604^2 + 4621^2 .

It is a cyclic number.

It is not a de Polignac number, because 42550457 - 2⁶ = 42550393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42550451) 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, 5798 + ... + 10895.

It is an arithmetic number, because the mean of its divisors is an integer number (10642425).

Almost surely, 2^42550457 is an apocalyptic number.

It is an amenable number.

42550457 is a deficient number, since it is larger than the sum of its proper divisors (19243).

42550457 is a wasteful number, since it uses less digits than its factorization.

42550457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19242.

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 42550457 is about 6523.0711325265. The cubic root of 42550457 is about 349.1146521390.

The spelling of 42550457 in words is "forty-two million, five hundred fifty thousand, four hundred fifty-seven".