42546681 has 32 divisors (see below), whose sum is σ = 66844800. Its totient is φ = 26671680.

The previous prime is 42546671. The next prime is 42546697. The reversal of 42546681 is 18664524.

It is not a de Polignac number, because 42546681 - 2⁹ = 42546169 is a prime.

It is a super-2 number, since 2×42546681² = 3620440128231522, which contains 22 as substring.

Its product of digits (46080) is a multiple of the sum of its prime divisors (640).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42546641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100851 + ... + 101271.

It is an arithmetic number, because the mean of its divisors is an integer number (2088900).

Almost surely, 2^42546681 is an apocalyptic number.

It is an amenable number.

42546681 is a deficient number, since it is larger than the sum of its proper divisors (24298119).

42546681 is a wasteful number, since it uses less digits than its factorization.

42546681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 42546681 is about 6522.7816918858. The cubic root of 42546681 is about 349.1043248240.

The spelling of 42546681 in words is "forty-two million, five hundred forty-six thousand, six hundred eighty-one".