42049421 has 4 divisors (see below), whose sum is σ = 42225600. Its totient is φ = 41873244.

The previous prime is 42049417. The next prime is 42049429. The reversal of 42049421 is 12494024.

42049421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 42049421 - 2² = 42049417 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 (42049429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87731 + ... + 88208.

It is an arithmetic number, because the mean of its divisors is an integer number (10556400).

Almost surely, 2^42049421 is an apocalyptic number.

It is an amenable number.

42049421 is a deficient number, since it is larger than the sum of its proper divisors (176179).

42049421 is a wasteful number, since it uses less digits than its factorization.

42049421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176178.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42049421 is about 6484.5524903420. The cubic root of 42049421 is about 347.7389512951.

The spelling of 42049421 in words is "forty-two million, forty-nine thousand, four hundred twenty-one".