42421955 has 8 divisors (see below), whose sum is σ = 51071904. Its totient is φ = 33827200.

The previous prime is 42421933. The next prime is 42421957. The reversal of 42421955 is 55912424.

42421955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42421955 - 2¹⁸ = 42159811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42421957) 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 7 ways as a sum of consecutive naturals, for example, 12086 + ... + 15195.

It is an arithmetic number, because the mean of its divisors is an integer number (6383988).

Almost surely, 2^42421955 is an apocalyptic number.

42421955 is a deficient number, since it is larger than the sum of its proper divisors (8649949).

42421955 is a wasteful number, since it uses less digits than its factorization.

42421955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27597.

The product of its digits is 14400, while the sum is 32.

The square root of 42421955 is about 6513.2138764208. The cubic root of 42421955 is about 348.7628567178.

The spelling of 42421955 in words is "forty-two million, four hundred twenty-one thousand, nine hundred fifty-five".