42606081 has 40 divisors (see below), whose sum is σ = 73343424. Its totient is φ = 24144480.

The previous prime is 42606061. The next prime is 42606089. The reversal of 42606081 is 18060624.

It is not a de Polignac number, because 42606081 - 2⁵ = 42606049 is a prime.

It is a super-2 number, since 2×42606081² = 3630556276357122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42606089) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 92191 + ... + 92651.

Almost surely, 2^42606081 is an apocalyptic number.

It is an amenable number.

42606081 is a deficient number, since it is larger than the sum of its proper divisors (30737343).

42606081 is a wasteful number, since it uses less digits than its factorization.

42606081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 42606081 is about 6527.3333758894. Note that the first 4 decimals coincide. The cubic root of 42606081 is about 349.2667123756.

The spelling of 42606081 in words is "forty-two million, six hundred six thousand, eighty-one".