42549898 has 4 divisors (see below), whose sum is σ = 63824850. Its totient is φ = 21274948.

The previous prime is 42549883. The next prime is 42549901. The reversal of 42549898 is 89894524.

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., 42341049 + 208849 = 6507^2 + 457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637473 + ... + 10637476.

Almost surely, 2^42549898 is an apocalyptic number.

42549898 is a deficient number, since it is larger than the sum of its proper divisors (21274952).

42549898 is a wasteful number, since it uses less digits than its factorization.

42549898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21274951.

The product of its digits is 829440, while the sum is 49.

The square root of 42549898 is about 6523.0282844703. The cubic root of 42549898 is about 349.1131233192.

The spelling of 42549898 in words is "forty-two million, five hundred forty-nine thousand, eight hundred ninety-eight".