42549849 has 6 divisors (see below), whose sum is σ = 61460906. Its totient is φ = 28366560.

The previous prime is 42549847. The next prime is 42549853. The reversal of 42549849 is 94894524.

It can be written as a sum of positive squares in only one way, i.e., 41409225 + 1140624 = 6435^2 + 1068^2 .

It is not a de Polignac number, because 42549849 - 2¹ = 42549847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42549847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2363872 + ... + 2363889.

Almost surely, 2^42549849 is an apocalyptic number.

It is an amenable number.

42549849 is a deficient number, since it is larger than the sum of its proper divisors (18911057).

42549849 is a wasteful number, since it uses less digits than its factorization.

42549849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727767 (or 4727764 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 42549849 is about 6523.0245285450. The cubic root of 42549849 is about 349.1129893075.

The spelling of 42549849 in words is "forty-two million, five hundred forty-nine thousand, eight hundred forty-nine".