42378455 has 16 divisors (see below), whose sum is σ = 61178880. Its totient is φ = 27529632.

The previous prime is 42378451. The next prime is 42378463. The reversal of 42378455 is 55487324.

It is a happy number.

42378455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42378455 - 2² = 42378451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378451) 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 15 ways as a sum of consecutive naturals, for example, 31199 + ... + 32528.

It is an arithmetic number, because the mean of its divisors is an integer number (3823680).

Almost surely, 2^42378455 is an apocalyptic number.

42378455 is a deficient number, since it is larger than the sum of its proper divisors (18800425).

42378455 is a wasteful number, since it uses less digits than its factorization.

42378455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63758.

The product of its digits is 134400, while the sum is 38.

The square root of 42378455 is about 6509.8736546879. The cubic root of 42378455 is about 348.6436073590.

The spelling of 42378455 in words is "forty-two million, three hundred seventy-eight thousand, four hundred fifty-five".