42160681 has 4 divisors (see below), whose sum is σ = 42570112. Its totient is φ = 41751252.

The previous prime is 42160667. The next prime is 42160687. The reversal of 42160681 is 18606124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42160681 - 2⁷ = 42160553 is a prime.

It is a super-2 number, since 2×42160681² = 3555046044767522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42160687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204561 + ... + 204766.

It is an arithmetic number, because the mean of its divisors is an integer number (10642528).

Almost surely, 2^42160681 is an apocalyptic number.

It is an amenable number.

42160681 is a deficient number, since it is larger than the sum of its proper divisors (409431).

42160681 is a wasteful number, since it uses less digits than its factorization.

42160681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409430.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42160681 is about 6493.1256725864. The cubic root of 42160681 is about 348.0453793159.

The spelling of 42160681 in words is "forty-two million, one hundred sixty thousand, six hundred eighty-one".