42550474 has 4 divisors (see below), whose sum is σ = 63825714. Its totient is φ = 21275236.

The previous prime is 42550451. The next prime is 42550493. The reversal of 42550474 is 47405524.

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

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 2772225 = 6307^2 + 1665^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637617 + ... + 10637620.

Almost surely, 2^42550474 is an apocalyptic number.

42550474 is a deficient number, since it is larger than the sum of its proper divisors (21275240).

42550474 is a wasteful number, since it uses less digits than its factorization.

42550474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21275239.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 42550474 is about 6523.0724355935. The cubic root of 42550474 is about 349.1146986325.

Adding to 42550474 its reverse (47405524), we get a palindrome (89955998).

The spelling of 42550474 in words is "forty-two million, five hundred fifty thousand, four hundred seventy-four".