42641811 has 6 divisors (see below), whose sum is σ = 61593740. Its totient is φ = 28427868.

The previous prime is 42641801. The next prime is 42641813. The reversal of 42641811 is 11814624.

It is a happy number.

42641811 is a `hidden beast` number, since 4 + 2 + 641 + 8 + 11 = 666.

It is not a de Polignac number, because 42641811 - 2⁵ = 42641779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42641813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2368981 + ... + 2368998.

Almost surely, 2^42641811 is an apocalyptic number.

42641811 is a deficient number, since it is larger than the sum of its proper divisors (18951929).

42641811 is a wasteful number, since it uses less digits than its factorization.

42641811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737985 (or 4737982 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 42641811 is about 6530.0697546045. The cubic root of 42641811 is about 349.3643182613.

The spelling of 42641811 in words is "forty-two million, six hundred forty-one thousand, eight hundred eleven".