42947449 has 4 divisors (see below), whose sum is σ = 42961536. Its totient is φ = 42933364.

The previous prime is 42947447. The next prime is 42947453. The reversal of 42947449 is 94474924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42947449 - 2¹ = 42947447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42947447) 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, 349 + ... + 9274.

It is an arithmetic number, because the mean of its divisors is an integer number (10740384).

Almost surely, 2^42947449 is an apocalyptic number.

It is an amenable number.

42947449 is a deficient number, since it is larger than the sum of its proper divisors (14087).

42947449 is an equidigital number, since it uses as much as digits as its factorization.

42947449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086.

The product of its digits is 290304, while the sum is 43.

The square root of 42947449 is about 6553.4303231209. The cubic root of 42947449 is about 350.1970291995.

The spelling of 42947449 in words is "forty-two million, nine hundred forty-seven thousand, four hundred forty-nine".