42449687 has 4 divisors (see below), whose sum is σ = 48513936. Its totient is φ = 36385440.

The previous prime is 42449683. The next prime is 42449713. The reversal of 42449687 is 78694424.

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

It is not a de Polignac number, because 42449687 - 2² = 42449683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42449683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3032114 + ... + 3032127.

It is an arithmetic number, because the mean of its divisors is an integer number (12128484).

Almost surely, 2^42449687 is an apocalyptic number.

42449687 is a deficient number, since it is larger than the sum of its proper divisors (6064249).

42449687 is an equidigital number, since it uses as much as digits as its factorization.

42449687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064248.

The product of its digits is 387072, while the sum is 44.

The square root of 42449687 is about 6515.3424315227. The cubic root of 42449687 is about 348.8388376947.

It can be divided in two parts, 4244 and 9687, that added together give a palindrome (13931).

The spelling of 42449687 in words is "forty-two million, four hundred forty-nine thousand, six hundred eighty-seven".