42456955 has 4 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 33965560.

The previous prime is 42456943. The next prime is 42456961. The reversal of 42456955 is 55965424.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-42456955 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4245691 + ... + 4245700.

It is an arithmetic number, because the mean of its divisors is an integer number (12737088).

Almost surely, 2^42456955 is an apocalyptic number.

42456955 is a deficient number, since it is larger than the sum of its proper divisors (8491397).

42456955 is an equidigital number, since it uses as much as digits as its factorization.

42456955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491396.

The product of its digits is 216000, while the sum is 40.

The square root of 42456955 is about 6515.9001680505. The cubic root of 42456955 is about 348.8587453090.

It can be divided in two parts, 42 and 456955, that multiplied together give a triangular number (19192110 = T₆₁₉₅).

The spelling of 42456955 in words is "forty-two million, four hundred fifty-six thousand, nine hundred fifty-five".