42166456 has 8 divisors (see below), whose sum is σ = 79062120. Its totient is φ = 21083224.

The previous prime is 42166427. The next prime is 42166459. The reversal of 42166456 is 65466124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42166459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635396 + ... + 2635411.

It is an arithmetic number, because the mean of its divisors is an integer number (9882765).

Almost surely, 2^42166456 is an apocalyptic number.

It is an amenable number.

42166456 is a deficient number, since it is larger than the sum of its proper divisors (36895664).

42166456 is a wasteful number, since it uses less digits than its factorization.

42166456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270813 (or 5270809 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 42166456 is about 6493.5703584392. The cubic root of 42166456 is about 348.0612698744.

The spelling of 42166456 in words is "forty-two million, one hundred sixty-six thousand, four hundred fifty-six".