42081696 has 36 divisors (see below), whose sum is σ = 119670642. Its totient is φ = 14027136.

The previous prime is 42081671. The next prime is 42081701. The reversal of 42081696 is 69618024.

It can be written as a sum of positive squares in only one way, i.e., 29550096 + 12531600 = 5436^2 + 3540^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42081696.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72771 + ... + 73346.

Almost surely, 2^42081696 is an apocalyptic number.

It is an amenable number.

42081696 is an abundant number, since it is smaller than the sum of its proper divisors (77588946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42081696 is a wasteful number, since it uses less digits than its factorization.

42081696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146133 (or 146122 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 42081696 is about 6487.0406195738. The cubic root of 42081696 is about 347.8278974616.

The spelling of 42081696 in words is "forty-two million, eighty-one thousand, six hundred ninety-six".