42880421 has 4 divisors (see below), whose sum is σ = 42931200. Its totient is φ = 42829644.

The previous prime is 42880393. The next prime is 42880457. The reversal of 42880421 is 12408824.

42880421 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 a de Polignac number, because none of the positive numbers 2^k-42880421 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 (42880921) 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, 24101 + ... + 25818.

It is an arithmetic number, because the mean of its divisors is an integer number (10732800).

Almost surely, 2^42880421 is an apocalyptic number.

It is an amenable number.

42880421 is a deficient number, since it is larger than the sum of its proper divisors (50779).

42880421 is an equidigital number, since it uses as much as digits as its factorization.

42880421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50778.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 42880421 is about 6548.3143632541. The cubic root of 42880421 is about 350.0147503988.

The spelling of 42880421 in words is "forty-two million, eight hundred eighty thousand, four hundred twenty-one".