42061811 has 4 divisors (see below), whose sum is σ = 45885624. Its totient is φ = 38238000.

The previous prime is 42061793. The next prime is 42061883. The reversal of 42061811 is 11816024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42061811 - 2¹⁴ = 42045427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42061211) 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, 1911890 + ... + 1911911.

It is an arithmetic number, because the mean of its divisors is an integer number (11471406).

Almost surely, 2^42061811 is an apocalyptic number.

42061811 is a deficient number, since it is larger than the sum of its proper divisors (3823813).

42061811 is a wasteful number, since it uses less digits than its factorization.

42061811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823812.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 42061811 is about 6485.5077673225. The cubic root of 42061811 is about 347.7731020824.

Adding to 42061811 its reverse (11816024), we get a palindrome (53877835).

The spelling of 42061811 in words is "forty-two million, sixty-one thousand, eight hundred eleven".